The terminal potential difference of a cell is less than its emf due to MCQ with Answer and Explanation

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The terminal potential difference of a cell is less than its emf due to

A. Internal resistance

B. Low temperature

C. External resistance

D. Overcharging

Answer: Option A

Solution (By JKSSB Mock Tests)

V = E - Ir, drop across internal resistance.

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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. 20 J

B. 100 J

C. 200 J

D. 0 J

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Correct Answer: Option C

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

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Question #2

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The greenhouse effect is mainly due to increase in

A. Carbon dioxide

B. Argon

C. Nitrogen

D. Oxygen

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Correct Answer: Option A

Explanation:
CO2, methane trap heat.

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Question #3

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The area under a velocity-time graph represents which of the following physical quantities?

A. Momentum

B. Acceleration

C. Displacement

D. Force

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Correct Answer: Option C

Explanation:
The area under the curve of a velocity-time graph represents the total displacement covered by an object in a given time interval. Since velocity = displacement/time, the product of velocity and time (the area) yields displacement. The slope of a velocity-time graph, conversely, represents acceleration.

This question belongs to: Science Physics

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