The material used for making solar cells is MCQ with Answer and Explanation

Question Report Error

The material used for making solar cells is

A. Silicon

B. Copper

C. Iron

D. Aluminium

Answer: Option A

Solution (By JKExamLibrary)

Silicon semiconductor, abundant, efficient for photovoltaic cells. Also gallium arsenide. Solar cells convert light to electricity. Renewable energy technology.

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1 Report Error

SI unit of luminous intensity:

A. Candela

B. Lumen

C. Watt

D. Lux

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Correct Answer: Option A

Explanation:
Candela (cd) is SI base unit for luminous intensity. Lumen: luminous flux; Lux: illuminance; Watt: power. Memory aid: 'Candela = candle power; base unit for perceived light'. Unit knowledge frequently tested in competitive exams.

This question belongs to: Science Physics

Question #2 Report Error

The scientist who invented the electric generator is

A. James Watt

B. Michael Faraday

C. Thomas Edison

D. Nikola Tesla

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Correct Answer: Option B

Explanation:
Michael Faraday built the first electric generator (Faraday disk) in 1831, based on electromagnetic induction. Tesla contributed to AC motor and polyphase system. Edison DC systems. Watt steam engine.

This question belongs to: Science Physics

Question #3 Report Error

Escape velocity from a planet depends on

A. Density of atmosphere

B. Mass and radius of planet

C. Radius of planet only

D. Mass of escaping body

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Correct Answer: Option B

Explanation:
v_esc = √(2GM/R), depends on planet's mass and radius, not body's mass.

This question belongs to: Science Physics

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