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  4. The coefficient of performance of a Carnot refrigerator working between 30° C and 0° C is :-

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Q. The coefficient of performance of a Carnot refrigerator working between $30^\circ C$ and $0^\circ C$ is :-

NTA AbhyasNTA Abhyas 2020

Solution:

Coefficient of performance
$K=\frac{T_{2}}{T_{1} - T_{2}}=\frac{273}{303 - 273}=\frac{273}{30}=9$