NEET UG PHYSICS MCQ: THERMODYNAMICS

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Analyzing +4 | -1

Two Carnot engines A and B are operated in series. The engine

A

receives heat from the source at temperature

T_1

and rejects the heat to the sink at temperature

\mathrm{T}

. The second engine

B

receives the heat at temperature

T

and rejects to its sink at temperature

T_2

. For what value of

T

the efficiencies of the two engines are equal?

View answer and explanation

Correct option: D

\sqrt{T_1 T_2}

Option D is correct because for the efficiencies of the two Carnot engines to be equal, the intermediate temperature T must be the geometric mean of the source and sink temperatures.

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