The energy equivalent of 1 amu is approximately MCQ with Answer and Explanation

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The energy equivalent of 1 amu is approximately

A. 931 eV

B. 1.6 × 10⁻¹⁹ J

C. 3.0 × 10⁸ J

D. 931 MeV

Answer: Option D

Solution (By JKExamLibrary)

1 amu = 1.6605 × 10⁻²⁷ kg, using E=mc² gives about 931.5 MeV. Used in nuclear binding energy calculations. Not eV, but MeV. Very large energy per nucleon.

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Question #1

The property of a body to resist change in its state of motion is called

A. Weight

B. Inertia

C. Momentum

D. Force

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Correct Answer: Option B

Explanation:
Inertia is directly proportional to mass. Heavier object harder to accelerate/decelerate. Newton's first law defines inertia. Momentum is mass × velocity, depends on motion.

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Question #2

A projectile is fired with velocity u at angle 45° with horizontal. Its time of flight is (g = 10 m/s²)

A. √2 u/5

B. u/5√2

C. √2 u/10

D. u/5

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Correct Answer: Option C

Explanation:
T = 2u sinθ/g = 2u sin45°/10 = 2u(1/√2)/10 = √2 u/10. SSC often tests projectile basics.

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Question #3

A pump lifts 100 kg of water through 5 m in 2 s. Power (g=10) is

A. 250 W

B. 1000 W

C. 500 W

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Correct Answer: Option D

Explanation:
Work = 100×10×5=5000 J. Power = 5000/2 = 2500 W.

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