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 downward with constant velocity

B. Moves upward with constant velocity

C. Accelerates upward

D. Accelerates downward

Answer: Option C

Solution (By JKExamLibrary)

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

This question belongs to: Science Physics

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Question #1

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An electron enters a magnetic field parallel to the field lines. Force is

A. Depends on speed

B. Maximum

C. Zero

D. Half of maximum

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Correct Answer: Option C

Explanation:
F = qvB sinθ, θ=0 => sin0=0, zero force.

This question belongs to: Science Physics

Question #2

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The gravitational force between two objects of masses 2 kg and 3 kg separated by 2 m (G = 6.67×10⁻¹¹) is

A. 1×10⁻¹⁰ N

B. 6.67×10⁻¹¹ N

C. 1.0005×10⁻¹⁰ N

D. 2×10⁻¹⁰ N

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Correct Answer: Option C

Explanation:
F = G m1 m2 / r² = 6.67×10⁻¹¹ × 6 / 4 = 6.67×10⁻¹¹ × 1.5 = 1.0005×10⁻¹⁰ N.

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Question #3

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A fuse wire is connected in which wire of the circuit?

A. Phase (live)

B. Any wire

C. Earth

D. Neutral

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Correct Answer: Option A

Explanation:
Fuse must be in live wire so that appliance is isolated when fuse blows.

This question belongs to: Science Physics

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