The SI unit of electric current is MCQ with Answer and Explanation

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The SI unit of electric current is

A. Coulomb

B. Ohm

C. Ampere

D. Volt

Answer: Option C

Solution (By JKSSB Mock Tests)

Ampere (A) is base unit, defined via force between conductors. 1 A = 1 C/s. Coulomb is charge. Volt potential. Ohm resistance.

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Practice More Physics Questions

Question #1

A flywheel rotates at 120 rpm. Angular velocity in rad/s is

A. 6π

B. π

C. 4π

D. 2π

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Correct Answer: Option C

Explanation:
ω = 2π × (rpm/60) = 2π × 120/60 = 4π rad/s.

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Question #2

A force of 12 N gives an object acceleration 4 m/s². Mass of object is

A. 3 kg

B. 8 kg

C. 48 kg

D. 0.33 kg

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Correct Answer: Option A

Explanation:
m = F/a = 12/4 = 3 kg.

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Question #3

A body of mass 2 kg is moving with velocity 5 m/s. Its kinetic energy is

A. 5 J

B. 50 J

C. 25 J

D. 10 J

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Correct Answer: Option C

Explanation:
K.E. = ½ m v² = ½ × 2 × 5² = 1 × 25 = 25 J. Use formula correctly. If velocity doubled, KE quadrupled. Unit joule.

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