[1] The element of Electric stove is made of -
A.
Copper
B.
Invar
C.
Magnalium
D.
Nicrome
Ans:
Nicrome
Explanation :
Most heating elements use nichrome 80/20 (80% nickel, 20%chromium) wire, ribbon, or strip. Nichrome 80/20 is an ideal material, because it has relatively high resistance.
[2] Who invented the Centigrade scale?
A.
Anders Celsius
B.
Daniel Gabriel Fahrenheit
C.
William Thomsor
D.
Wright Brothers
Ans:
Anders Celsius
Explanation :
Swedish astronomer Anders Celsius invented the Celsius temperature scale in 1742 A.D The Celsius scale invented by him has 100 degrees between the freezing point (0 ºC) and boiling point (100 ºC) of pure water at sea level air pressure.
[3] The following is an amplifying device :
A.
a transformer
B.
a transistor
C.
a diode
D.
a resistor
Ans:
a transistor
Explanation :
A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power.
[4] Which of the following is used in oven?
A.
X-rays
B.
UV-rays
C.
Microwaves
D.
Radio waves
Ans:
Microwaves
Explanation :
An oven is a thermally insulated chamber used for the heating, baking or drying of a substance an d most commonly used for cooking.
[5] Which unit we use to express nuclear sizes?
A.
Tesla
B.
Newton
C.
Fermi
D.
None of above
Ans:
Fermi
Explanation :
A unit of length used to measure nuclear sizes, is Fermi. A unit of length used to measure nuclear distances, = 10⁻¹⁵ meter. Named for the Italian physicist Enrico Fermi (1901–1954).
[6] Which law states, "The rate of loss of heat by a body is directly proportional to the difference in temperature between the body and the surroundings."
A.
Doppler's Effect
B.
Newton's law of cooling
C.
Kirchhoff's Law
D.
Stefan's Law
Ans:
Newton's law of cooling
Explanation :
Kirchhoff's Law - Kirchhoff's Law signifies that good absorbers are good emitters. Stefan's Law - The radiant energy emitted by a black body per unit area per unit time is directly proportional to the fourth power of its absolute temperature.
[7] The constant temperature, the product of pressure and volume of a given amount of a gas is constant . This is .
A.
Gay-Lussac law
B.
Charles’s law
C.
Boyle’s law
D.
Pressure law
Ans:
Boyle’s law
Explanation :
Boyle's law is a gas law, stating that the pressure and volume of a gas have an inverse relationship, when temperature is held constant. If volume increases, then pressure decreases and vice versa when temperature is held constant.
[8] The device used for measuring the wavelength of X-rays is –
A.
G.M. Counter
B.
Cyclotron
C.
Bragg Spectrometer
D.
Mass Spectrometer
Ans:
Bragg Spectrometer
Explanation :
Bragg Spectrometer is an instrument used to analyze crystal structure by using X-rays. In it, a beam of collimated X-rays strikes the crystal, and a detector measures the angles and intensities of the reflected beam.
[9] If a lift is going up with acceleration, the apparent weight of a body is -
A.
More or less the true weight
B.
Equal to the true weight
C.
Less than the true weight
D.
More than the true weight
Ans:
More than the true weight
Explanation :
If a lift is going up with acceleration, the apparent weight of a body is more than the true weight.
[10] Centigrade and Fahrenheit temperatures are the same at –
A.
32°
B.
40°
C.
-273°
D.
-40°
Ans:
-40°
Explanation :
There is one point on the Fahrenheit and Celsius scales where the temperatures in degrees are equal. That is -400 Celsius or Fahrenheit.
[11] Two bodies kept at a certain distance feel a gravitational force F to each other. If the distance between them is made double the former distance, the force will be -
A.
2F
B.
F/2
C.
4F
D.
F/4
Ans:
F/4
Explanation :
0
[12] 1 Micron is equal to –
A.
10⁻⁹ m
B.
10⁻¹² m
C.
10⁻⁶ m
D.
10⁻¹⁵ m
Ans:
10⁻⁶ m
Explanation :
The micrometer or micron, is an SI derived unit of length equaling 1 x 10-6 of a metre, i.e., one millionth of a metre. It is a common unit of measurement for wavelengths of infrared radiation as well as sizes of cells and bacteria and is commonly used in plastics manufacturing.
[13] A wavelength of 0.3 m is produced in air and it travels at a speed of 300 m/s. Then it will be an –
A.
Audible wave
B.
Infrasonic wave
C.
Ultrasonic wave
D.
Microwave
Ans:
Audible wave
Explanation :
0
[14] Which instrument is used to measure altitudes in aircraft’s?
A.
Audiometer
B.
Ammeter
C.
Altimeter
D.
Anemometer
Ans:
Altimeter
Explanation :
Ammeter - Measures strength of electric current. Audiometer - Measures intensity of sound. Anemometer - Measures force and velocity of wind and directions.
[15] When an object is heated, the molecules of that object -
A.
began to move faster
B.
lose energy
C.
become heavier
D.
become lighter
Ans:
began to move faster
Explanation :
When heat is added to a substance, the molecules and atoms vibrate faster. Then the molecules of that object began to move faster.
[16] In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie?
A.
Visible
B.
Infrared
C.
Ultraviolet
D.
X-ray
Ans:
Ultraviolet
Explanation :
In physics and chemistry, the Lyman series is a hydrogen spectral series of transitions and resulting ultraviolet emission lines of the hydrogen atom as an electron goes from n > 2 to n = 1 (where n is the principal quantum number) the lowest energy level of the electron.
[17] A light wave is incident over a plane surface with velocity x. After reflection the velocity becomes-
A.
x/2
B.
x
C.
2x
D.
x/4
Ans:
x
Explanation :
When a ray of light incident on a boundary separating two media comes back into the same media, this phenomenon, is called reflection of light. After reflection velocity, wavelength and frequency of light remains same but intensity decreases.
[18] Which one of the following reflects back more sunlight as compared to other three?
A.
Sand desert
B.
Land covered with fresh snow
C.
Prairie land
D.
Paddy crop land
Ans:
Land covered with fresh snow
Explanation :
Albedo is the fraction of solar energy (shortwave radiation) reflected from the Earth back into space. It is a measure of the reflectivity of the earth's surface. Ice, especially with snow on top of it on land, has the highest albedo.
[19] The magnitude of current flowing between two end points of a conductor is proportional to the potential difference between them and is called as:
A.
Avogadro's law
B.
Rault's law
C.
Ohms law
D.
Faraday's law
Ans:
Ohms law
Explanation :
According to Ohm's Law, the potential difference (V) between two terminals of a current-carrying conductor is directly proportional to the current (I), flowing through it.
[20] At low temperature, Lead behaves as a –
A.
Semi conductor
B.
Super conductor
C.
Insulator
D.
Conductor
Ans:
Super conductor
Explanation :
Lead exhibit superconducting phase transitions at low temperatures of 7.2 Kelvin. This discovery was made in 1913. At this temperature (known as critical temperature), the electrical resistivity of lead drops to zero. The transition is so sudden and complete that it appears to be a transition to a different phase of matter; this superconducting phase is described by the BCS theory.
[21] The mean distance from the Sun to the Earth is called:
A.
Light year
B.
Astronomical Unit
C.
Parallactic Second
D.
Angstrom
Ans:
Astronomical Unit
Explanation :
The distance from the Earth to the Sun on average is about 149 million km which is often referred to as Astronomical Unit. 1 AU = 149 million km.
[22] “Curie” is the unit of –
A.
radioactivity
B.
temperature
C.
heat
D.
energy
Ans:
radioactivity
Explanation :
The curie (symbol Ci) is a non-SI unit of radioactivity, named ‘in honour of’ Pierre Curie. It was originally defined as “the quantity or mass of radium emanation in equilibrium with one gram of radium (element)”, but is currently defined as: 1 Ci = 3.7 × 1010 decays per second after more accurate measurements of the activity of 226Ra.
[23] Which of the following is the cleanest source of energy?
A.
Biofuel
B.
Fossil fuel
C.
Nuclear power
D.
Wind energy
Ans:
Wind energy
Explanation :
Solar, wind and hydro power are examples of cleanest energy sources. According to a new US study, Greenhouse gases produced over the lifetime of a wind turbine are less than that of fossil-fuel based energy sources and most other renewable. Only ocean energy (wave and tidal) and hydropower have lower emissions than wind. As a clean, fuel-free source of energy, wind turbines create energy without generating the damaging pollutants.
[24] Sending a frame to a group of stations is known as –
A.
Single casting
B.
Spreading
C.
Multicasting
D.
Casting
Ans:
Multicasting
Explanation :
In addition to transmitting frames directed to a single address, local area networks are capable of sending frames directed to a group of address, called a multicast address, which can be received by a group of stations. They can also send frames directed to all stations using the broadcast address.
[25] Which one among the following components cannot be developed within an "integrated circuit"?
A.
Diode
B.
Triode
C.
Transformer
D.
Transistor
Ans:
Transformer
Explanation :
Some components like transformers and inductors cannot be integrated into an IC except for very specialized high frequency applications. They have to be connected externally to the semiconductor pins. In general, transformers are located in circuit boards as separate components and cannot be integrated into semiconductor based integrated circuits.
Explanation :
Most heating elements use nichrome 80/20 (80% nickel, 20%chromium) wire, ribbon, or strip. Nichrome 80/20 is an ideal material, because it has relatively high resistance.
[2] Who invented the Centigrade scale?
A.
Anders Celsius
B.
Daniel Gabriel Fahrenheit
C.
William Thomsor
D.
Wright Brothers
Ans:
Anders Celsius
Explanation :
Swedish astronomer Anders Celsius invented the Celsius temperature scale in 1742 A.D The Celsius scale invented by him has 100 degrees between the freezing point (0 ºC) and boiling point (100 ºC) of pure water at sea level air pressure.
[3] The following is an amplifying device :
A.
a transformer
B.
a transistor
C.
a diode
D.
a resistor
Ans:
a transistor
Explanation :
A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power.
[4] Which of the following is used in oven?
A.
X-rays
B.
UV-rays
C.
Microwaves
D.
Radio waves
Ans:
Microwaves
Explanation :
An oven is a thermally insulated chamber used for the heating, baking or drying of a substance an d most commonly used for cooking.
[5] Which unit we use to express nuclear sizes?
A.
Tesla
B.
Newton
C.
Fermi
D.
None of above
Ans:
Fermi
Explanation :
A unit of length used to measure nuclear sizes, is Fermi. A unit of length used to measure nuclear distances, = 10⁻¹⁵ meter. Named for the Italian physicist Enrico Fermi (1901–1954).
[6] Which law states, "The rate of loss of heat by a body is directly proportional to the difference in temperature between the body and the surroundings."
A.
Doppler's Effect
B.
Newton's law of cooling
C.
Kirchhoff's Law
D.
Stefan's Law
Ans:
Newton's law of cooling
Explanation :
Kirchhoff's Law - Kirchhoff's Law signifies that good absorbers are good emitters. Stefan's Law - The radiant energy emitted by a black body per unit area per unit time is directly proportional to the fourth power of its absolute temperature.
[7] The constant temperature, the product of pressure and volume of a given amount of a gas is constant . This is .
A.
Gay-Lussac law
B.
Charles’s law
C.
Boyle’s law
D.
Pressure law
Ans:
Boyle’s law
Explanation :
Boyle's law is a gas law, stating that the pressure and volume of a gas have an inverse relationship, when temperature is held constant. If volume increases, then pressure decreases and vice versa when temperature is held constant.
[8] The device used for measuring the wavelength of X-rays is –
A.
G.M. Counter
B.
Cyclotron
C.
Bragg Spectrometer
D.
Mass Spectrometer
Ans:
Bragg Spectrometer
Explanation :
Bragg Spectrometer is an instrument used to analyze crystal structure by using X-rays. In it, a beam of collimated X-rays strikes the crystal, and a detector measures the angles and intensities of the reflected beam.
[9] If a lift is going up with acceleration, the apparent weight of a body is -
A.
More or less the true weight
B.
Equal to the true weight
C.
Less than the true weight
D.
More than the true weight
Ans:
More than the true weight
Explanation :
If a lift is going up with acceleration, the apparent weight of a body is more than the true weight.
[10] Centigrade and Fahrenheit temperatures are the same at –
A.
32°
B.
40°
C.
-273°
D.
-40°
Ans:
-40°
Explanation :
There is one point on the Fahrenheit and Celsius scales where the temperatures in degrees are equal. That is -400 Celsius or Fahrenheit.
[11] Two bodies kept at a certain distance feel a gravitational force F to each other. If the distance between them is made double the former distance, the force will be -
A.
2F
B.
F/2
C.
4F
D.
F/4
Ans:
F/4
Explanation :
0
[12] 1 Micron is equal to –
A.
10⁻⁹ m
B.
10⁻¹² m
C.
10⁻⁶ m
D.
10⁻¹⁵ m
Ans:
10⁻⁶ m
Explanation :
The micrometer or micron, is an SI derived unit of length equaling 1 x 10-6 of a metre, i.e., one millionth of a metre. It is a common unit of measurement for wavelengths of infrared radiation as well as sizes of cells and bacteria and is commonly used in plastics manufacturing.
[13] A wavelength of 0.3 m is produced in air and it travels at a speed of 300 m/s. Then it will be an –
A.
Audible wave
B.
Infrasonic wave
C.
Ultrasonic wave
D.
Microwave
Ans:
Audible wave
Explanation :
0
[14] Which instrument is used to measure altitudes in aircraft’s?
A.
Audiometer
B.
Ammeter
C.
Altimeter
D.
Anemometer
Ans:
Altimeter
Explanation :
Ammeter - Measures strength of electric current. Audiometer - Measures intensity of sound. Anemometer - Measures force and velocity of wind and directions.
[15] When an object is heated, the molecules of that object -
A.
began to move faster
B.
lose energy
C.
become heavier
D.
become lighter
Ans:
began to move faster
Explanation :
When heat is added to a substance, the molecules and atoms vibrate faster. Then the molecules of that object began to move faster.
[16] In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie?
A.
Visible
B.
Infrared
C.
Ultraviolet
D.
X-ray
Ans:
Ultraviolet
Explanation :
In physics and chemistry, the Lyman series is a hydrogen spectral series of transitions and resulting ultraviolet emission lines of the hydrogen atom as an electron goes from n > 2 to n = 1 (where n is the principal quantum number) the lowest energy level of the electron.
[17] A light wave is incident over a plane surface with velocity x. After reflection the velocity becomes-
A.
x/2
B.
x
C.
2x
D.
x/4
Ans:
x
Explanation :
When a ray of light incident on a boundary separating two media comes back into the same media, this phenomenon, is called reflection of light. After reflection velocity, wavelength and frequency of light remains same but intensity decreases.
[18] Which one of the following reflects back more sunlight as compared to other three?
A.
Sand desert
B.
Land covered with fresh snow
C.
Prairie land
D.
Paddy crop land
Ans:
Land covered with fresh snow
Explanation :
Albedo is the fraction of solar energy (shortwave radiation) reflected from the Earth back into space. It is a measure of the reflectivity of the earth's surface. Ice, especially with snow on top of it on land, has the highest albedo.
[19] The magnitude of current flowing between two end points of a conductor is proportional to the potential difference between them and is called as:
A.
Avogadro's law
B.
Rault's law
C.
Ohms law
D.
Faraday's law
Ans:
Ohms law
Explanation :
According to Ohm's Law, the potential difference (V) between two terminals of a current-carrying conductor is directly proportional to the current (I), flowing through it.
[20] At low temperature, Lead behaves as a –
A.
Semi conductor
B.
Super conductor
C.
Insulator
D.
Conductor
Ans:
Super conductor
Explanation :
Lead exhibit superconducting phase transitions at low temperatures of 7.2 Kelvin. This discovery was made in 1913. At this temperature (known as critical temperature), the electrical resistivity of lead drops to zero. The transition is so sudden and complete that it appears to be a transition to a different phase of matter; this superconducting phase is described by the BCS theory.
[21] The mean distance from the Sun to the Earth is called:
A.
Light year
B.
Astronomical Unit
C.
Parallactic Second
D.
Angstrom
Ans:
Astronomical Unit
Explanation :
The distance from the Earth to the Sun on average is about 149 million km which is often referred to as Astronomical Unit. 1 AU = 149 million km.
[22] “Curie” is the unit of –
A.
radioactivity
B.
temperature
C.
heat
D.
energy
Ans:
radioactivity
Explanation :
The curie (symbol Ci) is a non-SI unit of radioactivity, named ‘in honour of’ Pierre Curie. It was originally defined as “the quantity or mass of radium emanation in equilibrium with one gram of radium (element)”, but is currently defined as: 1 Ci = 3.7 × 1010 decays per second after more accurate measurements of the activity of 226Ra.
[23] Which of the following is the cleanest source of energy?
A.
Biofuel
B.
Fossil fuel
C.
Nuclear power
D.
Wind energy
Ans:
Wind energy
Explanation :
Solar, wind and hydro power are examples of cleanest energy sources. According to a new US study, Greenhouse gases produced over the lifetime of a wind turbine are less than that of fossil-fuel based energy sources and most other renewable. Only ocean energy (wave and tidal) and hydropower have lower emissions than wind. As a clean, fuel-free source of energy, wind turbines create energy without generating the damaging pollutants.
[24] Sending a frame to a group of stations is known as –
A.
Single casting
B.
Spreading
C.
Multicasting
D.
Casting
Ans:
Multicasting
Explanation :
In addition to transmitting frames directed to a single address, local area networks are capable of sending frames directed to a group of address, called a multicast address, which can be received by a group of stations. They can also send frames directed to all stations using the broadcast address.
[25] Which one among the following components cannot be developed within an "integrated circuit"?
A.
Diode
B.
Triode
C.
Transformer
D.
Transistor
Ans:
Transformer
Explanation :
Some components like transformers and inductors cannot be integrated into an IC except for very specialized high frequency applications. They have to be connected externally to the semiconductor pins. In general, transformers are located in circuit boards as separate components and cannot be integrated into semiconductor based integrated circuits.
Explanation :
A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power.
[4] Which of the following is used in oven?
A.
X-rays
B.
UV-rays
C.
Microwaves
D.
Radio waves
Ans:
Microwaves
Explanation :
An oven is a thermally insulated chamber used for the heating, baking or drying of a substance an d most commonly used for cooking.
[5] Which unit we use to express nuclear sizes?
A.
Tesla
B.
Newton
C.
Fermi
D.
None of above
Ans:
Fermi
Explanation :
A unit of length used to measure nuclear sizes, is Fermi. A unit of length used to measure nuclear distances, = 10⁻¹⁵ meter. Named for the Italian physicist Enrico Fermi (1901–1954).
[6] Which law states, "The rate of loss of heat by a body is directly proportional to the difference in temperature between the body and the surroundings."
A.
Doppler's Effect
B.
Newton's law of cooling
C.
Kirchhoff's Law
D.
Stefan's Law
Ans:
Newton's law of cooling
Explanation :
Kirchhoff's Law - Kirchhoff's Law signifies that good absorbers are good emitters. Stefan's Law - The radiant energy emitted by a black body per unit area per unit time is directly proportional to the fourth power of its absolute temperature.
[7] The constant temperature, the product of pressure and volume of a given amount of a gas is constant . This is .
A.
Gay-Lussac law
B.
Charles’s law
C.
Boyle’s law
D.
Pressure law
Ans:
Boyle’s law
Explanation :
Boyle's law is a gas law, stating that the pressure and volume of a gas have an inverse relationship, when temperature is held constant. If volume increases, then pressure decreases and vice versa when temperature is held constant.
[8] The device used for measuring the wavelength of X-rays is –
A.
G.M. Counter
B.
Cyclotron
C.
Bragg Spectrometer
D.
Mass Spectrometer
Ans:
Bragg Spectrometer
Explanation :
Bragg Spectrometer is an instrument used to analyze crystal structure by using X-rays. In it, a beam of collimated X-rays strikes the crystal, and a detector measures the angles and intensities of the reflected beam.
[9] If a lift is going up with acceleration, the apparent weight of a body is -
A.
More or less the true weight
B.
Equal to the true weight
C.
Less than the true weight
D.
More than the true weight
Ans:
More than the true weight
Explanation :
If a lift is going up with acceleration, the apparent weight of a body is more than the true weight.
[10] Centigrade and Fahrenheit temperatures are the same at –
A.
32°
B.
40°
C.
-273°
D.
-40°
Ans:
-40°
Explanation :
There is one point on the Fahrenheit and Celsius scales where the temperatures in degrees are equal. That is -400 Celsius or Fahrenheit.
[11] Two bodies kept at a certain distance feel a gravitational force F to each other. If the distance between them is made double the former distance, the force will be -
A.
2F
B.
F/2
C.
4F
D.
F/4
Ans:
F/4
Explanation :
0
[12] 1 Micron is equal to –
A.
10⁻⁹ m
B.
10⁻¹² m
C.
10⁻⁶ m
D.
10⁻¹⁵ m
Ans:
10⁻⁶ m
Explanation :
The micrometer or micron, is an SI derived unit of length equaling 1 x 10-6 of a metre, i.e., one millionth of a metre. It is a common unit of measurement for wavelengths of infrared radiation as well as sizes of cells and bacteria and is commonly used in plastics manufacturing.
[13] A wavelength of 0.3 m is produced in air and it travels at a speed of 300 m/s. Then it will be an –
A.
Audible wave
B.
Infrasonic wave
C.
Ultrasonic wave
D.
Microwave
Ans:
Audible wave
Explanation :
0
[14] Which instrument is used to measure altitudes in aircraft’s?
A.
Audiometer
B.
Ammeter
C.
Altimeter
D.
Anemometer
Ans:
Altimeter
Explanation :
Ammeter - Measures strength of electric current. Audiometer - Measures intensity of sound. Anemometer - Measures force and velocity of wind and directions.
[15] When an object is heated, the molecules of that object -
A.
began to move faster
B.
lose energy
C.
become heavier
D.
become lighter
Ans:
began to move faster
Explanation :
When heat is added to a substance, the molecules and atoms vibrate faster. Then the molecules of that object began to move faster.
[16] In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie?
A.
Visible
B.
Infrared
C.
Ultraviolet
D.
X-ray
Ans:
Ultraviolet
Explanation :
In physics and chemistry, the Lyman series is a hydrogen spectral series of transitions and resulting ultraviolet emission lines of the hydrogen atom as an electron goes from n > 2 to n = 1 (where n is the principal quantum number) the lowest energy level of the electron.
[17] A light wave is incident over a plane surface with velocity x. After reflection the velocity becomes-
A.
x/2
B.
x
C.
2x
D.
x/4
Ans:
x
Explanation :
When a ray of light incident on a boundary separating two media comes back into the same media, this phenomenon, is called reflection of light. After reflection velocity, wavelength and frequency of light remains same but intensity decreases.
[18] Which one of the following reflects back more sunlight as compared to other three?
A.
Sand desert
B.
Land covered with fresh snow
C.
Prairie land
D.
Paddy crop land
Ans:
Land covered with fresh snow
Explanation :
Albedo is the fraction of solar energy (shortwave radiation) reflected from the Earth back into space. It is a measure of the reflectivity of the earth's surface. Ice, especially with snow on top of it on land, has the highest albedo.
[19] The magnitude of current flowing between two end points of a conductor is proportional to the potential difference between them and is called as:
A.
Avogadro's law
B.
Rault's law
C.
Ohms law
D.
Faraday's law
Ans:
Ohms law
Explanation :
According to Ohm's Law, the potential difference (V) between two terminals of a current-carrying conductor is directly proportional to the current (I), flowing through it.
[20] At low temperature, Lead behaves as a –
A.
Semi conductor
B.
Super conductor
C.
Insulator
D.
Conductor
Ans:
Super conductor
Explanation :
Lead exhibit superconducting phase transitions at low temperatures of 7.2 Kelvin. This discovery was made in 1913. At this temperature (known as critical temperature), the electrical resistivity of lead drops to zero. The transition is so sudden and complete that it appears to be a transition to a different phase of matter; this superconducting phase is described by the BCS theory.
[21] The mean distance from the Sun to the Earth is called:
A.
Light year
B.
Astronomical Unit
C.
Parallactic Second
D.
Angstrom
Ans:
Astronomical Unit
Explanation :
The distance from the Earth to the Sun on average is about 149 million km which is often referred to as Astronomical Unit. 1 AU = 149 million km.
[22] “Curie” is the unit of –
A.
radioactivity
B.
temperature
C.
heat
D.
energy
Ans:
radioactivity
Explanation :
The curie (symbol Ci) is a non-SI unit of radioactivity, named ‘in honour of’ Pierre Curie. It was originally defined as “the quantity or mass of radium emanation in equilibrium with one gram of radium (element)”, but is currently defined as: 1 Ci = 3.7 × 1010 decays per second after more accurate measurements of the activity of 226Ra.
[23] Which of the following is the cleanest source of energy?
A.
Biofuel
B.
Fossil fuel
C.
Nuclear power
D.
Wind energy
Ans:
Wind energy
Explanation :
Solar, wind and hydro power are examples of cleanest energy sources. According to a new US study, Greenhouse gases produced over the lifetime of a wind turbine are less than that of fossil-fuel based energy sources and most other renewable. Only ocean energy (wave and tidal) and hydropower have lower emissions than wind. As a clean, fuel-free source of energy, wind turbines create energy without generating the damaging pollutants.
[24] Sending a frame to a group of stations is known as –
A.
Single casting
B.
Spreading
C.
Multicasting
D.
Casting
Ans:
Multicasting
Explanation :
In addition to transmitting frames directed to a single address, local area networks are capable of sending frames directed to a group of address, called a multicast address, which can be received by a group of stations. They can also send frames directed to all stations using the broadcast address.
[25] Which one among the following components cannot be developed within an "integrated circuit"?
A.
Diode
B.
Triode
C.
Transformer
D.
Transistor
Ans:
Transformer
Explanation :
Some components like transformers and inductors cannot be integrated into an IC except for very specialized high frequency applications. They have to be connected externally to the semiconductor pins. In general, transformers are located in circuit boards as separate components and cannot be integrated into semiconductor based integrated circuits.
Explanation :
A unit of length used to measure nuclear sizes, is Fermi. A unit of length used to measure nuclear distances, = 10⁻¹⁵ meter. Named for the Italian physicist Enrico Fermi (1901–1954).
[6] Which law states, "The rate of loss of heat by a body is directly proportional to the difference in temperature between the body and the surroundings."
A.
Doppler's Effect
B.
Newton's law of cooling
C.
Kirchhoff's Law
D.
Stefan's Law
Ans:
Newton's law of cooling
Explanation :
Kirchhoff's Law - Kirchhoff's Law signifies that good absorbers are good emitters. Stefan's Law - The radiant energy emitted by a black body per unit area per unit time is directly proportional to the fourth power of its absolute temperature.
[7] The constant temperature, the product of pressure and volume of a given amount of a gas is constant . This is .
A.
Gay-Lussac law
B.
Charles’s law
C.
Boyle’s law
D.
Pressure law
Ans:
Boyle’s law
Explanation :
Boyle's law is a gas law, stating that the pressure and volume of a gas have an inverse relationship, when temperature is held constant. If volume increases, then pressure decreases and vice versa when temperature is held constant.
[8] The device used for measuring the wavelength of X-rays is –
A.
G.M. Counter
B.
Cyclotron
C.
Bragg Spectrometer
D.
Mass Spectrometer
Ans:
Bragg Spectrometer
Explanation :
Bragg Spectrometer is an instrument used to analyze crystal structure by using X-rays. In it, a beam of collimated X-rays strikes the crystal, and a detector measures the angles and intensities of the reflected beam.
[9] If a lift is going up with acceleration, the apparent weight of a body is -
A.
More or less the true weight
B.
Equal to the true weight
C.
Less than the true weight
D.
More than the true weight
Ans:
More than the true weight
Explanation :
If a lift is going up with acceleration, the apparent weight of a body is more than the true weight.
[10] Centigrade and Fahrenheit temperatures are the same at –
A.
32°
B.
40°
C.
-273°
D.
-40°
Ans:
-40°
Explanation :
There is one point on the Fahrenheit and Celsius scales where the temperatures in degrees are equal. That is -400 Celsius or Fahrenheit.
[11] Two bodies kept at a certain distance feel a gravitational force F to each other. If the distance between them is made double the former distance, the force will be -
A.
2F
B.
F/2
C.
4F
D.
F/4
Ans:
F/4
Explanation :
0
[12] 1 Micron is equal to –
A.
10⁻⁹ m
B.
10⁻¹² m
C.
10⁻⁶ m
D.
10⁻¹⁵ m
Ans:
10⁻⁶ m
Explanation :
The micrometer or micron, is an SI derived unit of length equaling 1 x 10-6 of a metre, i.e., one millionth of a metre. It is a common unit of measurement for wavelengths of infrared radiation as well as sizes of cells and bacteria and is commonly used in plastics manufacturing.
[13] A wavelength of 0.3 m is produced in air and it travels at a speed of 300 m/s. Then it will be an –
A.
Audible wave
B.
Infrasonic wave
C.
Ultrasonic wave
D.
Microwave
Ans:
Audible wave
Explanation :
0
[14] Which instrument is used to measure altitudes in aircraft’s?
A.
Audiometer
B.
Ammeter
C.
Altimeter
D.
Anemometer
Ans:
Altimeter
Explanation :
Ammeter - Measures strength of electric current. Audiometer - Measures intensity of sound. Anemometer - Measures force and velocity of wind and directions.
[15] When an object is heated, the molecules of that object -
A.
began to move faster
B.
lose energy
C.
become heavier
D.
become lighter
Ans:
began to move faster
Explanation :
When heat is added to a substance, the molecules and atoms vibrate faster. Then the molecules of that object began to move faster.
[16] In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie?
A.
Visible
B.
Infrared
C.
Ultraviolet
D.
X-ray
Ans:
Ultraviolet
Explanation :
In physics and chemistry, the Lyman series is a hydrogen spectral series of transitions and resulting ultraviolet emission lines of the hydrogen atom as an electron goes from n > 2 to n = 1 (where n is the principal quantum number) the lowest energy level of the electron.
[17] A light wave is incident over a plane surface with velocity x. After reflection the velocity becomes-
A.
x/2
B.
x
C.
2x
D.
x/4
Ans:
x
Explanation :
When a ray of light incident on a boundary separating two media comes back into the same media, this phenomenon, is called reflection of light. After reflection velocity, wavelength and frequency of light remains same but intensity decreases.
[18] Which one of the following reflects back more sunlight as compared to other three?
A.
Sand desert
B.
Land covered with fresh snow
C.
Prairie land
D.
Paddy crop land
Ans:
Land covered with fresh snow
Explanation :
Albedo is the fraction of solar energy (shortwave radiation) reflected from the Earth back into space. It is a measure of the reflectivity of the earth's surface. Ice, especially with snow on top of it on land, has the highest albedo.
[19] The magnitude of current flowing between two end points of a conductor is proportional to the potential difference between them and is called as:
A.
Avogadro's law
B.
Rault's law
C.
Ohms law
D.
Faraday's law
Ans:
Ohms law
Explanation :
According to Ohm's Law, the potential difference (V) between two terminals of a current-carrying conductor is directly proportional to the current (I), flowing through it.
[20] At low temperature, Lead behaves as a –
A.
Semi conductor
B.
Super conductor
C.
Insulator
D.
Conductor
Ans:
Super conductor
Explanation :
Lead exhibit superconducting phase transitions at low temperatures of 7.2 Kelvin. This discovery was made in 1913. At this temperature (known as critical temperature), the electrical resistivity of lead drops to zero. The transition is so sudden and complete that it appears to be a transition to a different phase of matter; this superconducting phase is described by the BCS theory.
[21] The mean distance from the Sun to the Earth is called:
A.
Light year
B.
Astronomical Unit
C.
Parallactic Second
D.
Angstrom
Ans:
Astronomical Unit
Explanation :
The distance from the Earth to the Sun on average is about 149 million km which is often referred to as Astronomical Unit. 1 AU = 149 million km.
[22] “Curie” is the unit of –
A.
radioactivity
B.
temperature
C.
heat
D.
energy
Ans:
radioactivity
Explanation :
The curie (symbol Ci) is a non-SI unit of radioactivity, named ‘in honour of’ Pierre Curie. It was originally defined as “the quantity or mass of radium emanation in equilibrium with one gram of radium (element)”, but is currently defined as: 1 Ci = 3.7 × 1010 decays per second after more accurate measurements of the activity of 226Ra.
[23] Which of the following is the cleanest source of energy?
A.
Biofuel
B.
Fossil fuel
C.
Nuclear power
D.
Wind energy
Ans:
Wind energy
Explanation :
Solar, wind and hydro power are examples of cleanest energy sources. According to a new US study, Greenhouse gases produced over the lifetime of a wind turbine are less than that of fossil-fuel based energy sources and most other renewable. Only ocean energy (wave and tidal) and hydropower have lower emissions than wind. As a clean, fuel-free source of energy, wind turbines create energy without generating the damaging pollutants.
[24] Sending a frame to a group of stations is known as –
A.
Single casting
B.
Spreading
C.
Multicasting
D.
Casting
Ans:
Multicasting
Explanation :
In addition to transmitting frames directed to a single address, local area networks are capable of sending frames directed to a group of address, called a multicast address, which can be received by a group of stations. They can also send frames directed to all stations using the broadcast address.
[25] Which one among the following components cannot be developed within an "integrated circuit"?
A.
Diode
B.
Triode
C.
Transformer
D.
Transistor
Ans:
Transformer
Explanation :
Some components like transformers and inductors cannot be integrated into an IC except for very specialized high frequency applications. They have to be connected externally to the semiconductor pins. In general, transformers are located in circuit boards as separate components and cannot be integrated into semiconductor based integrated circuits.
Explanation :
Boyle's law is a gas law, stating that the pressure and volume of a gas have an inverse relationship, when temperature is held constant. If volume increases, then pressure decreases and vice versa when temperature is held constant.
[8] The device used for measuring the wavelength of X-rays is –
A.
G.M. Counter
B.
Cyclotron
C.
Bragg Spectrometer
D.
Mass Spectrometer
Ans:
Bragg Spectrometer
Explanation :
Bragg Spectrometer is an instrument used to analyze crystal structure by using X-rays. In it, a beam of collimated X-rays strikes the crystal, and a detector measures the angles and intensities of the reflected beam.
[9] If a lift is going up with acceleration, the apparent weight of a body is -
A.
More or less the true weight
B.
Equal to the true weight
C.
Less than the true weight
D.
More than the true weight
Ans:
More than the true weight
Explanation :
If a lift is going up with acceleration, the apparent weight of a body is more than the true weight.
[10] Centigrade and Fahrenheit temperatures are the same at –
A.
32°
B.
40°
C.
-273°
D.
-40°
Ans:
-40°
Explanation :
There is one point on the Fahrenheit and Celsius scales where the temperatures in degrees are equal. That is -400 Celsius or Fahrenheit.
[11] Two bodies kept at a certain distance feel a gravitational force F to each other. If the distance between them is made double the former distance, the force will be -
A.
2F
B.
F/2
C.
4F
D.
F/4
Ans:
F/4
Explanation :
0
[12] 1 Micron is equal to –
A.
10⁻⁹ m
B.
10⁻¹² m
C.
10⁻⁶ m
D.
10⁻¹⁵ m
Ans:
10⁻⁶ m
Explanation :
The micrometer or micron, is an SI derived unit of length equaling 1 x 10-6 of a metre, i.e., one millionth of a metre. It is a common unit of measurement for wavelengths of infrared radiation as well as sizes of cells and bacteria and is commonly used in plastics manufacturing.
[13] A wavelength of 0.3 m is produced in air and it travels at a speed of 300 m/s. Then it will be an –
A.
Audible wave
B.
Infrasonic wave
C.
Ultrasonic wave
D.
Microwave
Ans:
Audible wave
Explanation :
0
[14] Which instrument is used to measure altitudes in aircraft’s?
A.
Audiometer
B.
Ammeter
C.
Altimeter
D.
Anemometer
Ans:
Altimeter
Explanation :
Ammeter - Measures strength of electric current. Audiometer - Measures intensity of sound. Anemometer - Measures force and velocity of wind and directions.
[15] When an object is heated, the molecules of that object -
A.
began to move faster
B.
lose energy
C.
become heavier
D.
become lighter
Ans:
began to move faster
Explanation :
When heat is added to a substance, the molecules and atoms vibrate faster. Then the molecules of that object began to move faster.
[16] In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie?
A.
Visible
B.
Infrared
C.
Ultraviolet
D.
X-ray
Ans:
Ultraviolet
Explanation :
In physics and chemistry, the Lyman series is a hydrogen spectral series of transitions and resulting ultraviolet emission lines of the hydrogen atom as an electron goes from n > 2 to n = 1 (where n is the principal quantum number) the lowest energy level of the electron.
[17] A light wave is incident over a plane surface with velocity x. After reflection the velocity becomes-
A.
x/2
B.
x
C.
2x
D.
x/4
Ans:
x
Explanation :
When a ray of light incident on a boundary separating two media comes back into the same media, this phenomenon, is called reflection of light. After reflection velocity, wavelength and frequency of light remains same but intensity decreases.
[18] Which one of the following reflects back more sunlight as compared to other three?
A.
Sand desert
B.
Land covered with fresh snow
C.
Prairie land
D.
Paddy crop land
Ans:
Land covered with fresh snow
Explanation :
Albedo is the fraction of solar energy (shortwave radiation) reflected from the Earth back into space. It is a measure of the reflectivity of the earth's surface. Ice, especially with snow on top of it on land, has the highest albedo.
[19] The magnitude of current flowing between two end points of a conductor is proportional to the potential difference between them and is called as:
A.
Avogadro's law
B.
Rault's law
C.
Ohms law
D.
Faraday's law
Ans:
Ohms law
Explanation :
According to Ohm's Law, the potential difference (V) between two terminals of a current-carrying conductor is directly proportional to the current (I), flowing through it.
[20] At low temperature, Lead behaves as a –
A.
Semi conductor
B.
Super conductor
C.
Insulator
D.
Conductor
Ans:
Super conductor
Explanation :
Lead exhibit superconducting phase transitions at low temperatures of 7.2 Kelvin. This discovery was made in 1913. At this temperature (known as critical temperature), the electrical resistivity of lead drops to zero. The transition is so sudden and complete that it appears to be a transition to a different phase of matter; this superconducting phase is described by the BCS theory.
[21] The mean distance from the Sun to the Earth is called:
A.
Light year
B.
Astronomical Unit
C.
Parallactic Second
D.
Angstrom
Ans:
Astronomical Unit
Explanation :
The distance from the Earth to the Sun on average is about 149 million km which is often referred to as Astronomical Unit. 1 AU = 149 million km.
[22] “Curie” is the unit of –
A.
radioactivity
B.
temperature
C.
heat
D.
energy
Ans:
radioactivity
Explanation :
The curie (symbol Ci) is a non-SI unit of radioactivity, named ‘in honour of’ Pierre Curie. It was originally defined as “the quantity or mass of radium emanation in equilibrium with one gram of radium (element)”, but is currently defined as: 1 Ci = 3.7 × 1010 decays per second after more accurate measurements of the activity of 226Ra.
[23] Which of the following is the cleanest source of energy?
A.
Biofuel
B.
Fossil fuel
C.
Nuclear power
D.
Wind energy
Ans:
Wind energy
Explanation :
Solar, wind and hydro power are examples of cleanest energy sources. According to a new US study, Greenhouse gases produced over the lifetime of a wind turbine are less than that of fossil-fuel based energy sources and most other renewable. Only ocean energy (wave and tidal) and hydropower have lower emissions than wind. As a clean, fuel-free source of energy, wind turbines create energy without generating the damaging pollutants.
[24] Sending a frame to a group of stations is known as –
A.
Single casting
B.
Spreading
C.
Multicasting
D.
Casting
Ans:
Multicasting
Explanation :
In addition to transmitting frames directed to a single address, local area networks are capable of sending frames directed to a group of address, called a multicast address, which can be received by a group of stations. They can also send frames directed to all stations using the broadcast address.
[25] Which one among the following components cannot be developed within an "integrated circuit"?
A.
Diode
B.
Triode
C.
Transformer
D.
Transistor
Ans:
Transformer
Explanation :
Some components like transformers and inductors cannot be integrated into an IC except for very specialized high frequency applications. They have to be connected externally to the semiconductor pins. In general, transformers are located in circuit boards as separate components and cannot be integrated into semiconductor based integrated circuits.
Explanation :
If a lift is going up with acceleration, the apparent weight of a body is more than the true weight.
[10] Centigrade and Fahrenheit temperatures are the same at –
A.
32°
B.
40°
C.
-273°
D.
-40°
Ans:
-40°
Explanation :
There is one point on the Fahrenheit and Celsius scales where the temperatures in degrees are equal. That is -400 Celsius or Fahrenheit.
[11] Two bodies kept at a certain distance feel a gravitational force F to each other. If the distance between them is made double the former distance, the force will be -
A.
2F
B.
F/2
C.
4F
D.
F/4
Ans:
F/4
Explanation :
0
[12] 1 Micron is equal to –
A.
10⁻⁹ m
B.
10⁻¹² m
C.
10⁻⁶ m
D.
10⁻¹⁵ m
Ans:
10⁻⁶ m
Explanation :
The micrometer or micron, is an SI derived unit of length equaling 1 x 10-6 of a metre, i.e., one millionth of a metre. It is a common unit of measurement for wavelengths of infrared radiation as well as sizes of cells and bacteria and is commonly used in plastics manufacturing.
[13] A wavelength of 0.3 m is produced in air and it travels at a speed of 300 m/s. Then it will be an –
A.
Audible wave
B.
Infrasonic wave
C.
Ultrasonic wave
D.
Microwave
Ans:
Audible wave
Explanation :
0
[14] Which instrument is used to measure altitudes in aircraft’s?
A.
Audiometer
B.
Ammeter
C.
Altimeter
D.
Anemometer
Ans:
Altimeter
Explanation :
Ammeter - Measures strength of electric current. Audiometer - Measures intensity of sound. Anemometer - Measures force and velocity of wind and directions.
[15] When an object is heated, the molecules of that object -
A.
began to move faster
B.
lose energy
C.
become heavier
D.
become lighter
Ans:
began to move faster
Explanation :
When heat is added to a substance, the molecules and atoms vibrate faster. Then the molecules of that object began to move faster.
[16] In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie?
A.
Visible
B.
Infrared
C.
Ultraviolet
D.
X-ray
Ans:
Ultraviolet
Explanation :
In physics and chemistry, the Lyman series is a hydrogen spectral series of transitions and resulting ultraviolet emission lines of the hydrogen atom as an electron goes from n > 2 to n = 1 (where n is the principal quantum number) the lowest energy level of the electron.
[17] A light wave is incident over a plane surface with velocity x. After reflection the velocity becomes-
A.
x/2
B.
x
C.
2x
D.
x/4
Ans:
x
Explanation :
When a ray of light incident on a boundary separating two media comes back into the same media, this phenomenon, is called reflection of light. After reflection velocity, wavelength and frequency of light remains same but intensity decreases.
[18] Which one of the following reflects back more sunlight as compared to other three?
A.
Sand desert
B.
Land covered with fresh snow
C.
Prairie land
D.
Paddy crop land
Ans:
Land covered with fresh snow
Explanation :
Albedo is the fraction of solar energy (shortwave radiation) reflected from the Earth back into space. It is a measure of the reflectivity of the earth's surface. Ice, especially with snow on top of it on land, has the highest albedo.
[19] The magnitude of current flowing between two end points of a conductor is proportional to the potential difference between them and is called as:
A.
Avogadro's law
B.
Rault's law
C.
Ohms law
D.
Faraday's law
Ans:
Ohms law
Explanation :
According to Ohm's Law, the potential difference (V) between two terminals of a current-carrying conductor is directly proportional to the current (I), flowing through it.
[20] At low temperature, Lead behaves as a –
A.
Semi conductor
B.
Super conductor
C.
Insulator
D.
Conductor
Ans:
Super conductor
Explanation :
Lead exhibit superconducting phase transitions at low temperatures of 7.2 Kelvin. This discovery was made in 1913. At this temperature (known as critical temperature), the electrical resistivity of lead drops to zero. The transition is so sudden and complete that it appears to be a transition to a different phase of matter; this superconducting phase is described by the BCS theory.
[21] The mean distance from the Sun to the Earth is called:
A.
Light year
B.
Astronomical Unit
C.
Parallactic Second
D.
Angstrom
Ans:
Astronomical Unit
Explanation :
The distance from the Earth to the Sun on average is about 149 million km which is often referred to as Astronomical Unit. 1 AU = 149 million km.
[22] “Curie” is the unit of –
A.
radioactivity
B.
temperature
C.
heat
D.
energy
Ans:
radioactivity
Explanation :
The curie (symbol Ci) is a non-SI unit of radioactivity, named ‘in honour of’ Pierre Curie. It was originally defined as “the quantity or mass of radium emanation in equilibrium with one gram of radium (element)”, but is currently defined as: 1 Ci = 3.7 × 1010 decays per second after more accurate measurements of the activity of 226Ra.
[23] Which of the following is the cleanest source of energy?
A.
Biofuel
B.
Fossil fuel
C.
Nuclear power
D.
Wind energy
Ans:
Wind energy
Explanation :
Solar, wind and hydro power are examples of cleanest energy sources. According to a new US study, Greenhouse gases produced over the lifetime of a wind turbine are less than that of fossil-fuel based energy sources and most other renewable. Only ocean energy (wave and tidal) and hydropower have lower emissions than wind. As a clean, fuel-free source of energy, wind turbines create energy without generating the damaging pollutants.
[24] Sending a frame to a group of stations is known as –
A.
Single casting
B.
Spreading
C.
Multicasting
D.
Casting
Ans:
Multicasting
Explanation :
In addition to transmitting frames directed to a single address, local area networks are capable of sending frames directed to a group of address, called a multicast address, which can be received by a group of stations. They can also send frames directed to all stations using the broadcast address.
[25] Which one among the following components cannot be developed within an "integrated circuit"?
A.
Diode
B.
Triode
C.
Transformer
D.
Transistor
Ans:
Transformer
Explanation :
Some components like transformers and inductors cannot be integrated into an IC except for very specialized high frequency applications. They have to be connected externally to the semiconductor pins. In general, transformers are located in circuit boards as separate components and cannot be integrated into semiconductor based integrated circuits.
Explanation :
0
[12] 1 Micron is equal to –
A.
10⁻⁹ m
B.
10⁻¹² m
C.
10⁻⁶ m
D.
10⁻¹⁵ m
Ans:
10⁻⁶ m
Explanation :
The micrometer or micron, is an SI derived unit of length equaling 1 x 10-6 of a metre, i.e., one millionth of a metre. It is a common unit of measurement for wavelengths of infrared radiation as well as sizes of cells and bacteria and is commonly used in plastics manufacturing.
[13] A wavelength of 0.3 m is produced in air and it travels at a speed of 300 m/s. Then it will be an –
A.
Audible wave
B.
Infrasonic wave
C.
Ultrasonic wave
D.
Microwave
Ans:
Audible wave
Explanation :
0
[14] Which instrument is used to measure altitudes in aircraft’s?
A.
Audiometer
B.
Ammeter
C.
Altimeter
D.
Anemometer
Ans:
Altimeter
Explanation :
Ammeter - Measures strength of electric current. Audiometer - Measures intensity of sound. Anemometer - Measures force and velocity of wind and directions.
[15] When an object is heated, the molecules of that object -
A.
began to move faster
B.
lose energy
C.
become heavier
D.
become lighter
Ans:
began to move faster
Explanation :
When heat is added to a substance, the molecules and atoms vibrate faster. Then the molecules of that object began to move faster.
[16] In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie?
A.
Visible
B.
Infrared
C.
Ultraviolet
D.
X-ray
Ans:
Ultraviolet
Explanation :
In physics and chemistry, the Lyman series is a hydrogen spectral series of transitions and resulting ultraviolet emission lines of the hydrogen atom as an electron goes from n > 2 to n = 1 (where n is the principal quantum number) the lowest energy level of the electron.
[17] A light wave is incident over a plane surface with velocity x. After reflection the velocity becomes-
A.
x/2
B.
x
C.
2x
D.
x/4
Ans:
x
Explanation :
When a ray of light incident on a boundary separating two media comes back into the same media, this phenomenon, is called reflection of light. After reflection velocity, wavelength and frequency of light remains same but intensity decreases.
[18] Which one of the following reflects back more sunlight as compared to other three?
A.
Sand desert
B.
Land covered with fresh snow
C.
Prairie land
D.
Paddy crop land
Ans:
Land covered with fresh snow
Explanation :
Albedo is the fraction of solar energy (shortwave radiation) reflected from the Earth back into space. It is a measure of the reflectivity of the earth's surface. Ice, especially with snow on top of it on land, has the highest albedo.
[19] The magnitude of current flowing between two end points of a conductor is proportional to the potential difference between them and is called as:
A.
Avogadro's law
B.
Rault's law
C.
Ohms law
D.
Faraday's law
Ans:
Ohms law
Explanation :
According to Ohm's Law, the potential difference (V) between two terminals of a current-carrying conductor is directly proportional to the current (I), flowing through it.
[20] At low temperature, Lead behaves as a –
A.
Semi conductor
B.
Super conductor
C.
Insulator
D.
Conductor
Ans:
Super conductor
Explanation :
Lead exhibit superconducting phase transitions at low temperatures of 7.2 Kelvin. This discovery was made in 1913. At this temperature (known as critical temperature), the electrical resistivity of lead drops to zero. The transition is so sudden and complete that it appears to be a transition to a different phase of matter; this superconducting phase is described by the BCS theory.
[21] The mean distance from the Sun to the Earth is called:
A.
Light year
B.
Astronomical Unit
C.
Parallactic Second
D.
Angstrom
Ans:
Astronomical Unit
Explanation :
The distance from the Earth to the Sun on average is about 149 million km which is often referred to as Astronomical Unit. 1 AU = 149 million km.
[22] “Curie” is the unit of –
A.
radioactivity
B.
temperature
C.
heat
D.
energy
Ans:
radioactivity
Explanation :
The curie (symbol Ci) is a non-SI unit of radioactivity, named ‘in honour of’ Pierre Curie. It was originally defined as “the quantity or mass of radium emanation in equilibrium with one gram of radium (element)”, but is currently defined as: 1 Ci = 3.7 × 1010 decays per second after more accurate measurements of the activity of 226Ra.
[23] Which of the following is the cleanest source of energy?
A.
Biofuel
B.
Fossil fuel
C.
Nuclear power
D.
Wind energy
Ans:
Wind energy
Explanation :
Solar, wind and hydro power are examples of cleanest energy sources. According to a new US study, Greenhouse gases produced over the lifetime of a wind turbine are less than that of fossil-fuel based energy sources and most other renewable. Only ocean energy (wave and tidal) and hydropower have lower emissions than wind. As a clean, fuel-free source of energy, wind turbines create energy without generating the damaging pollutants.
[24] Sending a frame to a group of stations is known as –
A.
Single casting
B.
Spreading
C.
Multicasting
D.
Casting
Ans:
Multicasting
Explanation :
In addition to transmitting frames directed to a single address, local area networks are capable of sending frames directed to a group of address, called a multicast address, which can be received by a group of stations. They can also send frames directed to all stations using the broadcast address.
[25] Which one among the following components cannot be developed within an "integrated circuit"?
A.
Diode
B.
Triode
C.
Transformer
D.
Transistor
Ans:
Transformer
Explanation :
Some components like transformers and inductors cannot be integrated into an IC except for very specialized high frequency applications. They have to be connected externally to the semiconductor pins. In general, transformers are located in circuit boards as separate components and cannot be integrated into semiconductor based integrated circuits.
Explanation :
0
[14] Which instrument is used to measure altitudes in aircraft’s?
A.
Audiometer
B.
Ammeter
C.
Altimeter
D.
Anemometer
Ans:
Altimeter
Explanation :
Ammeter - Measures strength of electric current. Audiometer - Measures intensity of sound. Anemometer - Measures force and velocity of wind and directions.
[15] When an object is heated, the molecules of that object -
A.
began to move faster
B.
lose energy
C.
become heavier
D.
become lighter
Ans:
began to move faster
Explanation :
When heat is added to a substance, the molecules and atoms vibrate faster. Then the molecules of that object began to move faster.
[16] In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie?
A.
Visible
B.
Infrared
C.
Ultraviolet
D.
X-ray
Ans:
Ultraviolet
Explanation :
In physics and chemistry, the Lyman series is a hydrogen spectral series of transitions and resulting ultraviolet emission lines of the hydrogen atom as an electron goes from n > 2 to n = 1 (where n is the principal quantum number) the lowest energy level of the electron.
[17] A light wave is incident over a plane surface with velocity x. After reflection the velocity becomes-
A.
x/2
B.
x
C.
2x
D.
x/4
Ans:
x
Explanation :
When a ray of light incident on a boundary separating two media comes back into the same media, this phenomenon, is called reflection of light. After reflection velocity, wavelength and frequency of light remains same but intensity decreases.
[18] Which one of the following reflects back more sunlight as compared to other three?
A.
Sand desert
B.
Land covered with fresh snow
C.
Prairie land
D.
Paddy crop land
Ans:
Land covered with fresh snow
Explanation :
Albedo is the fraction of solar energy (shortwave radiation) reflected from the Earth back into space. It is a measure of the reflectivity of the earth's surface. Ice, especially with snow on top of it on land, has the highest albedo.
[19] The magnitude of current flowing between two end points of a conductor is proportional to the potential difference between them and is called as:
A.
Avogadro's law
B.
Rault's law
C.
Ohms law
D.
Faraday's law
Ans:
Ohms law
Explanation :
According to Ohm's Law, the potential difference (V) between two terminals of a current-carrying conductor is directly proportional to the current (I), flowing through it.
[20] At low temperature, Lead behaves as a –
A.
Semi conductor
B.
Super conductor
C.
Insulator
D.
Conductor
Ans:
Super conductor
Explanation :
Lead exhibit superconducting phase transitions at low temperatures of 7.2 Kelvin. This discovery was made in 1913. At this temperature (known as critical temperature), the electrical resistivity of lead drops to zero. The transition is so sudden and complete that it appears to be a transition to a different phase of matter; this superconducting phase is described by the BCS theory.
[21] The mean distance from the Sun to the Earth is called:
A.
Light year
B.
Astronomical Unit
C.
Parallactic Second
D.
Angstrom
Ans:
Astronomical Unit
Explanation :
The distance from the Earth to the Sun on average is about 149 million km which is often referred to as Astronomical Unit. 1 AU = 149 million km.
[22] “Curie” is the unit of –
A.
radioactivity
B.
temperature
C.
heat
D.
energy
Ans:
radioactivity
Explanation :
The curie (symbol Ci) is a non-SI unit of radioactivity, named ‘in honour of’ Pierre Curie. It was originally defined as “the quantity or mass of radium emanation in equilibrium with one gram of radium (element)”, but is currently defined as: 1 Ci = 3.7 × 1010 decays per second after more accurate measurements of the activity of 226Ra.
[23] Which of the following is the cleanest source of energy?
A.
Biofuel
B.
Fossil fuel
C.
Nuclear power
D.
Wind energy
Ans:
Wind energy
Explanation :
Solar, wind and hydro power are examples of cleanest energy sources. According to a new US study, Greenhouse gases produced over the lifetime of a wind turbine are less than that of fossil-fuel based energy sources and most other renewable. Only ocean energy (wave and tidal) and hydropower have lower emissions than wind. As a clean, fuel-free source of energy, wind turbines create energy without generating the damaging pollutants.
[24] Sending a frame to a group of stations is known as –
A.
Single casting
B.
Spreading
C.
Multicasting
D.
Casting
Ans:
Multicasting
Explanation :
In addition to transmitting frames directed to a single address, local area networks are capable of sending frames directed to a group of address, called a multicast address, which can be received by a group of stations. They can also send frames directed to all stations using the broadcast address.
[25] Which one among the following components cannot be developed within an "integrated circuit"?
A.
Diode
B.
Triode
C.
Transformer
D.
Transistor
Ans:
Transformer
Explanation :
Some components like transformers and inductors cannot be integrated into an IC except for very specialized high frequency applications. They have to be connected externally to the semiconductor pins. In general, transformers are located in circuit boards as separate components and cannot be integrated into semiconductor based integrated circuits.
Explanation :
When heat is added to a substance, the molecules and atoms vibrate faster. Then the molecules of that object began to move faster.
[16] In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie?
A.
Visible
B.
Infrared
C.
Ultraviolet
D.
X-ray
Ans:
Ultraviolet
Explanation :
In physics and chemistry, the Lyman series is a hydrogen spectral series of transitions and resulting ultraviolet emission lines of the hydrogen atom as an electron goes from n > 2 to n = 1 (where n is the principal quantum number) the lowest energy level of the electron.
[17] A light wave is incident over a plane surface with velocity x. After reflection the velocity becomes-
A.
x/2
B.
x
C.
2x
D.
x/4
Ans:
x
Explanation :
When a ray of light incident on a boundary separating two media comes back into the same media, this phenomenon, is called reflection of light. After reflection velocity, wavelength and frequency of light remains same but intensity decreases.
[18] Which one of the following reflects back more sunlight as compared to other three?
A.
Sand desert
B.
Land covered with fresh snow
C.
Prairie land
D.
Paddy crop land
Ans:
Land covered with fresh snow
Explanation :
Albedo is the fraction of solar energy (shortwave radiation) reflected from the Earth back into space. It is a measure of the reflectivity of the earth's surface. Ice, especially with snow on top of it on land, has the highest albedo.
[19] The magnitude of current flowing between two end points of a conductor is proportional to the potential difference between them and is called as:
A.
Avogadro's law
B.
Rault's law
C.
Ohms law
D.
Faraday's law
Ans:
Ohms law
Explanation :
According to Ohm's Law, the potential difference (V) between two terminals of a current-carrying conductor is directly proportional to the current (I), flowing through it.
[20] At low temperature, Lead behaves as a –
A.
Semi conductor
B.
Super conductor
C.
Insulator
D.
Conductor
Ans:
Super conductor
Explanation :
Lead exhibit superconducting phase transitions at low temperatures of 7.2 Kelvin. This discovery was made in 1913. At this temperature (known as critical temperature), the electrical resistivity of lead drops to zero. The transition is so sudden and complete that it appears to be a transition to a different phase of matter; this superconducting phase is described by the BCS theory.
[21] The mean distance from the Sun to the Earth is called:
A.
Light year
B.
Astronomical Unit
C.
Parallactic Second
D.
Angstrom
Ans:
Astronomical Unit
Explanation :
The distance from the Earth to the Sun on average is about 149 million km which is often referred to as Astronomical Unit. 1 AU = 149 million km.
[22] “Curie” is the unit of –
A.
radioactivity
B.
temperature
C.
heat
D.
energy
Ans:
radioactivity
Explanation :
The curie (symbol Ci) is a non-SI unit of radioactivity, named ‘in honour of’ Pierre Curie. It was originally defined as “the quantity or mass of radium emanation in equilibrium with one gram of radium (element)”, but is currently defined as: 1 Ci = 3.7 × 1010 decays per second after more accurate measurements of the activity of 226Ra.
[23] Which of the following is the cleanest source of energy?
A.
Biofuel
B.
Fossil fuel
C.
Nuclear power
D.
Wind energy
Ans:
Wind energy
Explanation :
Solar, wind and hydro power are examples of cleanest energy sources. According to a new US study, Greenhouse gases produced over the lifetime of a wind turbine are less than that of fossil-fuel based energy sources and most other renewable. Only ocean energy (wave and tidal) and hydropower have lower emissions than wind. As a clean, fuel-free source of energy, wind turbines create energy without generating the damaging pollutants.
[24] Sending a frame to a group of stations is known as –
A.
Single casting
B.
Spreading
C.
Multicasting
D.
Casting
Ans:
Multicasting
Explanation :
In addition to transmitting frames directed to a single address, local area networks are capable of sending frames directed to a group of address, called a multicast address, which can be received by a group of stations. They can also send frames directed to all stations using the broadcast address.
[25] Which one among the following components cannot be developed within an "integrated circuit"?
A.
Diode
B.
Triode
C.
Transformer
D.
Transistor
Ans:
Transformer
Explanation :
Some components like transformers and inductors cannot be integrated into an IC except for very specialized high frequency applications. They have to be connected externally to the semiconductor pins. In general, transformers are located in circuit boards as separate components and cannot be integrated into semiconductor based integrated circuits.
Explanation :
When a ray of light incident on a boundary separating two media comes back into the same media, this phenomenon, is called reflection of light. After reflection velocity, wavelength and frequency of light remains same but intensity decreases.
[18] Which one of the following reflects back more sunlight as compared to other three?
A.
Sand desert
B.
Land covered with fresh snow
C.
Prairie land
D.
Paddy crop land
Ans:
Land covered with fresh snow
Explanation :
Albedo is the fraction of solar energy (shortwave radiation) reflected from the Earth back into space. It is a measure of the reflectivity of the earth's surface. Ice, especially with snow on top of it on land, has the highest albedo.
[19] The magnitude of current flowing between two end points of a conductor is proportional to the potential difference between them and is called as:
A.
Avogadro's law
B.
Rault's law
C.
Ohms law
D.
Faraday's law
Ans:
Ohms law
Explanation :
According to Ohm's Law, the potential difference (V) between two terminals of a current-carrying conductor is directly proportional to the current (I), flowing through it.
[20] At low temperature, Lead behaves as a –
A.
Semi conductor
B.
Super conductor
C.
Insulator
D.
Conductor
Ans:
Super conductor
Explanation :
Lead exhibit superconducting phase transitions at low temperatures of 7.2 Kelvin. This discovery was made in 1913. At this temperature (known as critical temperature), the electrical resistivity of lead drops to zero. The transition is so sudden and complete that it appears to be a transition to a different phase of matter; this superconducting phase is described by the BCS theory.
[21] The mean distance from the Sun to the Earth is called:
A.
Light year
B.
Astronomical Unit
C.
Parallactic Second
D.
Angstrom
Ans:
Astronomical Unit
Explanation :
The distance from the Earth to the Sun on average is about 149 million km which is often referred to as Astronomical Unit. 1 AU = 149 million km.
[22] “Curie” is the unit of –
A.
radioactivity
B.
temperature
C.
heat
D.
energy
Ans:
radioactivity
Explanation :
The curie (symbol Ci) is a non-SI unit of radioactivity, named ‘in honour of’ Pierre Curie. It was originally defined as “the quantity or mass of radium emanation in equilibrium with one gram of radium (element)”, but is currently defined as: 1 Ci = 3.7 × 1010 decays per second after more accurate measurements of the activity of 226Ra.
[23] Which of the following is the cleanest source of energy?
A.
Biofuel
B.
Fossil fuel
C.
Nuclear power
D.
Wind energy
Ans:
Wind energy
Explanation :
Solar, wind and hydro power are examples of cleanest energy sources. According to a new US study, Greenhouse gases produced over the lifetime of a wind turbine are less than that of fossil-fuel based energy sources and most other renewable. Only ocean energy (wave and tidal) and hydropower have lower emissions than wind. As a clean, fuel-free source of energy, wind turbines create energy without generating the damaging pollutants.
[24] Sending a frame to a group of stations is known as –
A.
Single casting
B.
Spreading
C.
Multicasting
D.
Casting
Ans:
Multicasting
Explanation :
In addition to transmitting frames directed to a single address, local area networks are capable of sending frames directed to a group of address, called a multicast address, which can be received by a group of stations. They can also send frames directed to all stations using the broadcast address.
[25] Which one among the following components cannot be developed within an "integrated circuit"?
A.
Diode
B.
Triode
C.
Transformer
D.
Transistor
Ans:
Transformer
Explanation :
Some components like transformers and inductors cannot be integrated into an IC except for very specialized high frequency applications. They have to be connected externally to the semiconductor pins. In general, transformers are located in circuit boards as separate components and cannot be integrated into semiconductor based integrated circuits.
Explanation :
According to Ohm's Law, the potential difference (V) between two terminals of a current-carrying conductor is directly proportional to the current (I), flowing through it.
[20] At low temperature, Lead behaves as a –
A.
Semi conductor
B.
Super conductor
C.
Insulator
D.
Conductor
Ans:
Super conductor
Explanation :
Lead exhibit superconducting phase transitions at low temperatures of 7.2 Kelvin. This discovery was made in 1913. At this temperature (known as critical temperature), the electrical resistivity of lead drops to zero. The transition is so sudden and complete that it appears to be a transition to a different phase of matter; this superconducting phase is described by the BCS theory.
[21] The mean distance from the Sun to the Earth is called:
A.
Light year
B.
Astronomical Unit
C.
Parallactic Second
D.
Angstrom
Ans:
Astronomical Unit
Explanation :
The distance from the Earth to the Sun on average is about 149 million km which is often referred to as Astronomical Unit. 1 AU = 149 million km.
[22] “Curie” is the unit of –
A.
radioactivity
B.
temperature
C.
heat
D.
energy
Ans:
radioactivity
Explanation :
The curie (symbol Ci) is a non-SI unit of radioactivity, named ‘in honour of’ Pierre Curie. It was originally defined as “the quantity or mass of radium emanation in equilibrium with one gram of radium (element)”, but is currently defined as: 1 Ci = 3.7 × 1010 decays per second after more accurate measurements of the activity of 226Ra.
[23] Which of the following is the cleanest source of energy?
A.
Biofuel
B.
Fossil fuel
C.
Nuclear power
D.
Wind energy
Ans:
Wind energy
Explanation :
Solar, wind and hydro power are examples of cleanest energy sources. According to a new US study, Greenhouse gases produced over the lifetime of a wind turbine are less than that of fossil-fuel based energy sources and most other renewable. Only ocean energy (wave and tidal) and hydropower have lower emissions than wind. As a clean, fuel-free source of energy, wind turbines create energy without generating the damaging pollutants.
[24] Sending a frame to a group of stations is known as –
A.
Single casting
B.
Spreading
C.
Multicasting
D.
Casting
Ans:
Multicasting
Explanation :
In addition to transmitting frames directed to a single address, local area networks are capable of sending frames directed to a group of address, called a multicast address, which can be received by a group of stations. They can also send frames directed to all stations using the broadcast address.
[25] Which one among the following components cannot be developed within an "integrated circuit"?
A.
Diode
B.
Triode
C.
Transformer
D.
Transistor
Ans:
Transformer
Explanation :
Some components like transformers and inductors cannot be integrated into an IC except for very specialized high frequency applications. They have to be connected externally to the semiconductor pins. In general, transformers are located in circuit boards as separate components and cannot be integrated into semiconductor based integrated circuits.
Explanation :
The distance from the Earth to the Sun on average is about 149 million km which is often referred to as Astronomical Unit. 1 AU = 149 million km.
[22] “Curie” is the unit of –
A.
radioactivity
B.
temperature
C.
heat
D.
energy
Ans:
radioactivity
Explanation :
The curie (symbol Ci) is a non-SI unit of radioactivity, named ‘in honour of’ Pierre Curie. It was originally defined as “the quantity or mass of radium emanation in equilibrium with one gram of radium (element)”, but is currently defined as: 1 Ci = 3.7 × 1010 decays per second after more accurate measurements of the activity of 226Ra.
[23] Which of the following is the cleanest source of energy?
A.
Biofuel
B.
Fossil fuel
C.
Nuclear power
D.
Wind energy
Ans:
Wind energy
Explanation :
Solar, wind and hydro power are examples of cleanest energy sources. According to a new US study, Greenhouse gases produced over the lifetime of a wind turbine are less than that of fossil-fuel based energy sources and most other renewable. Only ocean energy (wave and tidal) and hydropower have lower emissions than wind. As a clean, fuel-free source of energy, wind turbines create energy without generating the damaging pollutants.
[24] Sending a frame to a group of stations is known as –
A.
Single casting
B.
Spreading
C.
Multicasting
D.
Casting
Ans:
Multicasting
Explanation :
In addition to transmitting frames directed to a single address, local area networks are capable of sending frames directed to a group of address, called a multicast address, which can be received by a group of stations. They can also send frames directed to all stations using the broadcast address.
[25] Which one among the following components cannot be developed within an "integrated circuit"?
A.
Diode
B.
Triode
C.
Transformer
D.
Transistor
Ans:
Transformer
Explanation :
Some components like transformers and inductors cannot be integrated into an IC except for very specialized high frequency applications. They have to be connected externally to the semiconductor pins. In general, transformers are located in circuit boards as separate components and cannot be integrated into semiconductor based integrated circuits.
Explanation :
Solar, wind and hydro power are examples of cleanest energy sources. According to a new US study, Greenhouse gases produced over the lifetime of a wind turbine are less than that of fossil-fuel based energy sources and most other renewable. Only ocean energy (wave and tidal) and hydropower have lower emissions than wind. As a clean, fuel-free source of energy, wind turbines create energy without generating the damaging pollutants.
[24] Sending a frame to a group of stations is known as –
A.
Single casting
B.
Spreading
C.
Multicasting
D.
Casting
Ans:
Multicasting
Explanation :
In addition to transmitting frames directed to a single address, local area networks are capable of sending frames directed to a group of address, called a multicast address, which can be received by a group of stations. They can also send frames directed to all stations using the broadcast address.
[25] Which one among the following components cannot be developed within an "integrated circuit"?
A.
Diode
B.
Triode
C.
Transformer
D.
Transistor
Ans:
Transformer
Explanation :
Some components like transformers and inductors cannot be integrated into an IC except for very specialized high frequency applications. They have to be connected externally to the semiconductor pins. In general, transformers are located in circuit boards as separate components and cannot be integrated into semiconductor based integrated circuits.
Explanation :
Some components like transformers and inductors cannot be integrated into an IC except for very specialized high frequency applications. They have to be connected externally to the semiconductor pins. In general, transformers are located in circuit boards as separate components and cannot be integrated into semiconductor based integrated circuits.