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PHYSICS

Physics
A person does some work of 1,000 J in 2 s. His power will be ________

25W
1000W
500W
50W

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Physics
Which results in an increase in power?

Doing more work in more time.
Doing less work in more time.
Doing less work in less time.
Doing more work in less time.

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Physics
What device converts light energy to electrical energy?

Heliostats
Photovoltaic cell
Thermocouple
Photodiode

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Physics
In a water lifting electric pump, we convert

Electrical energy into Kinetic energy
Electrical energy into Potential energy
Kinetic energy into Electrical energy
Kinetic energy into Potential energy

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Physics
The device which converts sound energy into electrical energy is called

Amplifier
Microphone
Speaker
Transmitter

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