GK INFOPEDIA

[1] Which colour is formed when Red and Green are mixed? A. Light blue B. Yellow C. White D. Grey Ans: Yellow Explanation : Red, green and blue are the primary colors and all other colors can be created from them. When red and green combine, the result is yellow. [2] A water tank appears […]

[1] X-rays are – A. positively charged particles B. negatively charged particles C. neutral particles D. None of these Ans: neutral particles Explanation : Like gamma rays and neutrons, X-rays are electrically neutral. They have neither a positive nor a negative charge. They cannot be accelerated or made to change direction by a magnet or […]

[1] A photoelectric cell converts – A. Mechanical energy to electric energy B. Heat energy to mechanical energy C. Light energy to chemical energy D. Light energy to electrical energy Ans: Light energy to electrical energy Explanation : Photoelectric cell or photocell, device whose electrical characteristics (e.g., current, voltage, or resistance) vary when light is […]

[1] The freezing point of fresh water is – A. 4°C B. 3°C C. 5°C D. 0°C Ans: 0°C Explanation : The freezing point of water is the temperature at which water changes phase from a liquid to a solid. Under normal conditions, ordinary water freezes at 0°C, or 32°F. The temperature may be lower […]

[1] The method of magnetization is: A. hammering a magnet B. heating a magnet C. passing direct current through it D. passing alternating current through it Ans: hammering a magnet Explanation : Hammering a rod will either allow it to become slightly magnetic inlaid along a magnetic field (i.e.North – South) or demagnetize it if […]

[1] A kilowatt-hour is unit of – A. Energy B. Power C. Electric charge D. Electric current Ans: Energy Explanation : Work is defined as a force acting through a distance (a length of space), energy is always equivalent to the ability to exert pulls or pushes against the basic forces of nature, along a […]

[1] Which of the following is a good conductor of heat but a bad conductor of electricity? A. Celluloid B. Rubber C. Asbestos D. Mica Ans: Mica Explanation : Good conductors of heat are good conductors of electricity. Mica is an exception which although being a good conductor of heat and a bad conductor of […]

[1] The passengers standing in a bus fall in the backward direction when the stationary bus begins to move. Which of the following laws explains this situation? A. Newton’s First Law of Motion B. Newton’s Third Law of Motion C. Newton’s Second Law of Motion D. The Law of Conservation of Momentum Ans: Newton’s First […]

[1] An aircraft can perform aerobatic manoeuvres in a vertical loop because of- A. gravity B. centripetal force C. weight D. centrifugal force Ans: gravity Explanation : It happens because of gravity. A key feature of super maneuvering aircrafts is a high thrust-to-weight ratio; that is, the comparison of the force produced by the engines […]

[1] If in a motion, the axis of the rotation passes through an object, then the motion is called. A. Orbital motion B. Circulatory motion C. Spin motion D. Oscillatory motion Ans: Spin motion Explanation : A rotation is a circular movement of an object around a center (or point) of rotation A three- dimensional […]