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NEET 2002 Physics question

PhysicsThermodynamicsNEET 2002

The efficiency of carnot engine is 50% and temperature of sink is 500K. If temperature of source is kept constant and its efficiency raised to 60%, then the required temperature of the sink will be :

Answer: (3)

Solution

Carnot efficiency . For 50%: , so . For 60% with the source fixed at 1000 K: $0.6 = 1 -

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Question ID VK-088954