Which of the following is a non-renewable source of energy? MCQ with Answer and Explanation

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Which of the following is a non-renewable source of energy?

A. Coal

B. Wind energy

C. Solar energy

D. Tidal energy

Answer: Option A

Solution (By JKSSB Mock Tests)

Coal is fossil fuel, finite, non-renewable. Solar, wind, tidal are renewable. This relates to everyday physics and energy concepts.

This question belongs to: Science Physics

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Question #1

The device that converts light energy into electrical energy is

A. LED

B. Solar cell

C. Laser

D. Photodiode

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Correct Answer: Option B

Explanation:
Solar cell (photovoltaic cell) generates electricity from light.

This question belongs to: Science Physics

Question #2

A man in a lift feels heavier when lift

A. Accelerates downward

B. Moves downward with constant velocity

C. Moves upward with constant velocity

D. Accelerates upward

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Correct Answer: Option D

Explanation:
Apparent weight = m(g+a) > mg when accelerating upward.

This question belongs to: Science Physics

Question #3

A sound wave has wavelength 1.7 m and speed 340 m/s. Its frequency is

A. 200 Hz

B. 170 Hz

C. 578 Hz

D. 340 Hz

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Correct Answer: Option A

Explanation:
f = v/λ = 340/1.7 = 200 Hz.

This question belongs to: Science Physics

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