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Question

If the COP of Carnot refrigerator is 4, then the thermal efficiency of the Carnot engine would be ________ .

यदि कार्नोट रेफ्रिजरेटर का COP 4 है, तो कार्नोट इंजन की थर्मल दक्षता ________ होगी।

A.

0.33

B.

0.25

C.

0.2

D.

0.18

Answer ( Option C)

0.2

Solution

Given :Coefficient of performance of Carnot refrigerator


..Method 1..

Thermal efficiency of Carnot engine for the same temperature limit is given by

Hence, the correct option is (C).

..Method 2..

Hence, the correct option is (C).

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