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

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

A. 1000 W

B. 2500 W

C. 250 W

D. 500 W

Answer: Option B

Solution (By JKSSB Mock Tests)

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

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1

A device that converts light energy into electrical energy is

A. Solar cell

B. LED

C. Laser

D. Photodiode

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Correct Answer: Option A

Explanation:
Solar cell (photovoltaic cell) generates electricity from sunlight.

This question belongs to: Science Physics

Question #2

A constant force acting on a body of mass 5 kg changes its speed from 2 m/s to 8 m/s in 10 s. The magnitude of force is

A. 1 N

B. 0.5 N

C. 3 N

D. 5 N

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Correct Answer: Option C

Explanation:
Acceleration a = (v-u)/t = (8-2)/10 = 0.6 m/s². Force F = m×a = 5 × 0.6 = 3 N. Alternatively, impulse = change in momentum = 5×(8-2) = 30 kg m/s, time = 10 s, so average force = 30/10 = 3 N. Always check direction, but magnitude is 3 N.

This question belongs to: Science Physics

Question #3

The gravitational force between two bodies does not depend on

A. Distance between them

B. Presence of other bodies

C. Universal constant G

D. Their masses

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Correct Answer: Option B

Explanation:
Gravitational force independent of intervening medium and other bodies (principle of superposition).

This question belongs to: Science Physics

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