The dimensional formula for torque is same as MCQ with Answer and Explanation

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The dimensional formula for torque is same as

A. Work

B. Force

C. Impulse

D. Power

Answer: Option A

Solution (By JKSSB Mock Tests)

Torque = force × distance = [ML²T⁻²], same as work and energy.

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Question #1

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A body of mass 2 kg is raised to height 10 m and dropped. Potential energy just before dropping is (g=10)

A. 0 J

B. 100 J

C. 200 J

D. 20 J

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Correct Answer: Option C

Explanation:
PE = mgh = 2×10×10 = 200 J.

This question belongs to: Science Physics

Question #2

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The time period of a mass-spring system depends on

A. Gravity

B. Spring constant only

C. Mass only

D. Both mass and spring constant

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Correct Answer: Option D

Explanation:
T = 2π√(m/k). Depends on mass and stiffness.

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Question #3

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A stone tied to a string is whirled in a circle. The work done by tension in string is

A. Variable

B. Zero

C. Negative

D. Positive

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Correct Answer: Option B

Explanation:
Tension is towards centre, displacement is tangential (velocity). Force perpendicular to displacement, cos90°=0, work zero. Centripetal force does no work, doesn't change speed.

This question belongs to: Science Physics

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