Q761
Open questionIn a photocell light energy is converted into
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Q762
Open questionA voltaic cell converts chemical energy to
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Q763
Open questionThe work done by the string of a simple pendulum during one complete oscillation is equal to
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Q764
Open questionConversion of sound energy into electrical energy is done by
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Q765
Open questionIf a person moves a trolley for a distance of 10 m with a force of 50 N, then the work done is
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Q766
Open questionNecessary element of change in solar energy to electrical energy
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Q767
Open questionIn hydro power station, the motion produced in turbines is due to
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Q768
Open questionThe SI unit for measuring work and energy is
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Q769
Open questionIn a rechargeable cell what kind of energy is stored within the cell?
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Q770
Open questionA bullet is fired from a rifle which recoils after firing. The ratio of kinetic energy of the rifle to that of the bullet is
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Q771
Open questionA person does some work of 1,000 J in 2 s. His power will be ________
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Q772
Open questionWhich results in an increase in power?
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Q773
Open questionWhat device converts light energy to electrical energy?
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Q774
Open questionIn a water lifting electric pump, we convert
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Q775
Open questionThe device which converts sound energy into electrical energy is called
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Q776
Open questionWhat is the SI unit of Power?
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Q777
Open questionFor which one of the following does the centre of mass lie outside the body?
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Q778
Open questionWhen a pail of water is swung in a vertical circle, the water does not fall out at the top of the loop when the speed is
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Q779
Open questionFat can be seperated from milk in a cream seperator because of :
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Q780
Open questionIn case of uniform circular motion, the acceleration is
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