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Questions  

An ideal heat engine has an efficiencyη . The coefficient of performance of the engine when driven backward will be

a
1−(1/η)
b
η(1−η)
c
(1/η)−1
d
1/(1−η)

detailed solution

Correct option is C

η=1−T2T1     β=T2T1−T2=T2/T11−(T2/T1)=(1−η)η=1η−1

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