Physics - Study Mode

[#1071] Which results in an increase in power?
Correct Answer

(A) Doing more work in less time.

Explanation

Solution: By doing more work in less time we can increase the power. And, Power is inversely proportional to time taken to do a work. So, when we do more work in lesser time , power will also increase.

[#1072] What device converts light energy to electrical energy?
Correct Answer

(B) Photovoltaic cell

Explanation

Solution: Photovoltaic cell converts light energy to electrical energy.

[#1073] In a water lifting electric pump, we convert
Correct Answer

(A) Electrical energy into Potential energy

Explanation

Solution: In a water lifting electric pump, we convert electrical energy into potential energy.

[#1074] The device which converts sound energy into electrical energy is called
Correct Answer

(C) Microphone

Explanation

Solution: The device which converts sound energy into electrical energy is called microphone.

[#1075] What is the SI unit of Power?
Correct Answer

(B) Watt

Explanation

Solution: Watt is the SI unit of power.