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Questions  

The efficiency of the reversible heat engine is Î·r and that of irreversible heat engine is Î·i. Which of the following relations is correct

a
ηr>ηi
b
ηr<ηi
c
ηf=ηi
d
ηris greater than 1 and Î·i is less than 1

detailed solution

Correct option is A

The efficiency of a reversible engine is always greater than the efficiency of irreversible engine. In case of irreversible engine, a part of the energy may he dissipated  against friction, etc.

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