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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

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${Î·}_{r} > {Î·}_{i}$

${Î·}_{f} = {Î·}_{i}$

${Î·}_{r} < {Î·}_{i}$

${Î·}_{r}$ is greater than 1 and ${Î·}_{i}$ is less than 1

answer is A.

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Detailed Solution

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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