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Question

In a Carnot heat engine, the temperature of source and sink are 500 K and 375 K respectively. The efficiency of engine is


A
75%
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B
25%
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C
33%
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D
33%
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Solution

The correct option is B 25%
Temperature of source, T1=500 K
Temperature of sink, T2=375 K
Efficiency of Carnot heat engine,
η=1T2T1
η=1375500
η=0.25 or 25%

Physics

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