NEET UG PHYSICS MCQ: THERMODYNAMICS

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Analyzing +4 | -1

A Carnot engine is working between

127^\circ C\,\,{\text{and 27}}^\circ C{\text{.}}

The increase in efficiency will be maximum when the temperature of

View answer and explanation

Correct option: B

The sink is decreased by

50^\circ C

Option B is correct because decreasing the sink temperature has a greater impact on efficiency than increasing the source temperature, especially at lower temperatures.

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The work done during expansion of a gas is independent of pressure if the expansion takes place When heat is added to a system, which of the following is not possible? The

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A Carnot engine has efficiency

\frac{1}{4}

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\frac{1}{3}

when temperature of sink is decreased by 50 K (keeping source fixed). What is the original temperature of the sink? If sink and source temperature of a refrigerator are

4^{\circ} \mathrm{C}

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15^{\circ} \mathrm{C}

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