A solar cell converts MCQ with Answer and Explanation

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A solar cell converts

A. Light energy to electrical energy

B. Mechanical energy to electrical energy

C. Chemical energy to electrical energy

D. Heat energy to electrical energy

Answer: Option A

Solution (By JKExamLibrary)

Solar cell (photovoltaic cell) converts sunlight directly into electricity using semiconductor p-n junction. No heat involved. Battery converts chemical to electrical. Thermocouple heat to electrical. Solar energy is renewable.

This question belongs to: Science Physics

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Question #1

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A voltmeter is always connected in

A. Either series or parallel

B. Across the ammeter

C. Parallel

D. Series

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Correct Answer: Option C

Explanation:
Voltmeter measures potential difference, must be parallel.

This question belongs to: Science Physics

Question #2

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The SI unit of frequency is

A. Hertz

B. Watt

C. Metre

D. Second

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Correct Answer: Option A

Explanation:
Hertz (Hz) = cycle per second = s⁻¹. Named after Heinrich Hertz. For sound, radio waves. Kilohertz, megahertz, gigahertz.

This question belongs to: Science Physics

Question #3

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The process of evaporation results in

A. Cooling

B. Boiling

C. No temperature change

D. Heating

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Correct Answer: Option A

Explanation:
Evaporation absorbs latent heat from surroundings, causing cooling.

This question belongs to: Science Physics

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