JEE PHYSICS MCQ: THERMODYNAMICS

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Efficiency of Carnot engine is 100% if

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Correct option: B

{T_2} = 0K

Option B is correct. The efficiency of a Carnot engine is 100% only when the temperature of the cold reservoir (T2) is 0K, as

\eta = 1 - \frac{{T_2}}{{T_1}}

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