Assertion :The Carnot cycle is useful in understanding the performance of heat engines. Reason: The Carnot cycle provides a way of determining the maximum possible efficiency achievable with reservoirs of given temperatures.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Carnot cycle represents s process of an ideal heat engine which has a maximum efficiency of conversion of heat energy into mechanical energy. So, A is right. The efficiency of a Carnot cycle depends only on the temperature of heat reservoirs is source and sink. So, the reason is right and reason explains assertion.
So, option $A$ is correct.

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