A man in a lift feels heavier when lift MCQ with Answer and Explanation

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A man in a lift feels heavier when lift

A. Moves upward with constant velocity

B. Accelerates upward

C. Moves downward with constant velocity

D. Accelerates downward

Answer: Option B

Solution (By JKSSB Mock Tests)

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

This question belongs to: Science Physics

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Question #1

The scientist who invented the electric generator is

A. Nikola Tesla

B. Michael Faraday

C. James Watt

D. Thomas Edison

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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.

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Question #2

The number of significant figures in 0.00450 is

A. 2

B. 4

C. 5

D. 3

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Correct Answer: Option D

Explanation:
Leading zeros not significant. '450' has three digits, but the trailing zero after decimal is significant (4,5,0). So 3 significant figures. 0.00450 is 3 SF.

This question belongs to: Science Physics

Question #3

The unit of power is watt. It is equal to

A. N/s

B. J s

C. N m

D. J/s

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Correct Answer: Option D

Explanation:
Watt = joule / second.

This question belongs to: Science Physics

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