MHT CET 2025 Physics question

PhysicsThermodynamicsMHT CET 2025

A Carnot engine has efficiency . It becomes , when the temperature of sink is lowered by 57 K. The temperature of the source is

Answer: (C)

Solution

Carnot efficiency . First case: , so . Second case: sink at : , so . Subtracting:

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Question ID VK-101711