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PHYSICS

Physics
A voltaic cell converts chemical energy to

Light energy
Heat energy
Mechanical energy
Electrical energy

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Physics
The work done by the string of a simple pendulum during one complete oscillation is equal to

Kinetic energy of the pendulum
Potential energy of the pendulum
Zero
Total energy of the pendulum

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Physics
Conversion of sound energy into electrical energy is done by

Solar cell
Microphone
Loudspeaker
Gramophone

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Physics
If a person moves a trolley for a distance of 10 m with a force of 50 N, then the work done is

20 J
500 J
5 J
0.2 J

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Physics
Necessary element of change in solar energy to electrical energy

Berillium
Silicon
Pure Copper
Tantelum

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