GK INFOPEDIA

[1] Hydro-electric power is a: A. non-renewable natural resource B. a mixture of renewable and non-renewable natural resource C. neither renewable nor non renewable resource D. renewable natural resource Ans: renewable natural resource Explanation : Hydro-electric power is a renewable natural resource. [2] The electric motor converts – A. Electrical energy into mechanical energy B. […]

[1] Vehicles use to see the objects coming from behind. A. Concave lens B. Convex lens C. Convex mirror D. Concave mirror Ans: Convex lens Explanation : Convex mirror is used in rear view mirror of vehicles; so that the driver can see the traffic coming from behind. The field of view is widest in […]

[1] The fuse in an electric circuit is connected in – A. series with neutral B. parallel to live C. parallel to neutral D. series with live Ans: series with live Explanation : A fuse wire is a safety wire connected in series with the live wire that has high resistivity and low melting point. […]

[1] When a ship enters the sea from a river what will be the effect? A. It lowers B. It sways C. It rises a little D. It jolts Ans: It rises a little Explanation : When a ship enters the sea from a river, it rises a little since salt water is denser than […]

[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 […]

[1] If you look into a mirror and find that the image (your reflexion) is smaller than you, then the type of the mirror is – A. plano-concave mirror B. concave mirror C. plane mirror D. convex mirror Ans: convex mirror Explanation : A convex mirror, diverging mirror, or fish eye mirror is a curved […]

[1] Lognitudinal waves and Transverse waves are types of – A. Mechanical waves B. Non-Mechanical waves C. Both of above D. None of Above Ans: Mechanical waves Explanation : Mechanical Waves are waves which propagate through a material medium (solid, liquid, or gas) at a wave speed which depends on the elastic and inertial properties […]

[1] Why Earth is called the blue planet? A. Because of two-thirds surface covered by water B. Because of water laden clouds in the atmosphere C. Because of pollution in the atmosphere D. None of these Ans: Because of two-thirds surface covered by water Explanation : Earth is called the blue planet because two-thirds of […]

[1] What is colour of light related to? A. Amplitude B. Frequency C. Quality D. Velocity Ans: Amplitude Explanation : Colour or colour is the visual perceptual property corresponding in humans to the categories called red, green, blue, and others. Colour derives from the spectrum of light (distribution of light power versus wavelength) interacting in […]

[1] Which layer of the earth’s atmosphere reflects back the radio waves to the earth’s surface? A. Ionosphere B. Stratosphere C. Mesosphere D. Exosphere Ans: Ionosphere Explanation : Long distance propagation of radio waves depends on an invisible layer of charged particles, which envelops the Earth. This layer of charged particles known as the ionosphere […]