General Knowledge on Physics

(Click on suggested Options to select the answer \| Color Red means : Wrong & Green Means: Correct)
51. Which type/types of pen uses/use capillary action in addition to gravity for flow of ink? A. Fountain pen B. Ballpoint pen C. Gel pen D. Both ballpoint and gel pens Check Answer \| Discussion 52. When we speak into a microphone what type of vibrations the diaphragm executes? A. Free B. forced C. Resonant D. None of these Check Answer \| Discussion 53. Half portion of a rectangular piece of ice is wrapped with a white piece of cloth while the other half with black one. In this context which one of the following statements is correct? A. Ice melts more easily under white cloth B. Ice melts more easily under black cloth C. No Ice melts at all under the white cloth D. No ice melts at all under the black cloth Check Answer \| Discussion 54. Matter waves are A. electromagnetic waves B. transverse waves C. longitudinal waves D. de broglie waves Check Answer \| Discussion 55. The shape of a rain drop is spherical due to A. viscosity B. surface tension C. elasticity D. gravitation Check Answer \| Discussion 56. Light Emitting Diode (LED) converts? A. light energy into electrical energy B. electrical energy into light energy C. thermal energy into light energy D. mechenical energy into electrical energy Check Answer \| Discussion 57. In a pressure cooker, cooking is faster because the increase in vapour pressure A. Increases the specific heat B. decreases the specific heat C. decreases the boiling point D. increases the boiling point Check Answer \| Discussion 58. The function of heavy water in a nuclear reactor is to A. slow down the speed of neutrons B. increase the speed of neutrons C. cool down the reactor D. stop the nuclear reaction Check Answer \| Discussion 59. Which one of the following has given the centripetal force for a car moving on a road ? A. Force of breaks B. The driver of the car C. Force by the steering wheel D. Friction due to tyres Check Answer \| Discussion 60. A thin pin of iron can be made to float on water-drinking in a bowl . This phenomenon is due to the A. surface tension of water B. viscous nature of water C. presence of ionic bonds in water molecules D. presence of covalent bonds in water molecules Check Answer \| Discussion
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General Knowledge on Physics

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