What is the main component of solar cells? MCQ with Answer and Explanation

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What is the main component of solar cells?

A. Silicon

B. Iron

C. Aluminium

D. Copper

Answer: Option A

Solution (By JKSSB Mock Tests)

Silicon is used in photovoltaic cells.

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Question #1

The discovery of X-rays was made by:

A. Wilhelm Roentgen

B. James Chadwick

C. Enrico Fermi

D. Marie Curie

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Correct Answer: Option A

Explanation:
Roentgen discovered X-rays in 1895.

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Question #2

What is the SI unit of force?

A. Joule

B. Pascal

C. Watt

D. Newton

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Correct Answer: Option D

Explanation:
The Newton (N) is the SI unit of force.

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Question #3

Which of these is a renewable energy source?

A. Nuclear

B. Coal

C. Wind

D. Natural Gas

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Correct Answer: Option C

Explanation:
Wind energy is inexhaustible, making it a renewable source.

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