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  4. The coefficient of performance of a refrigerator working between 10° C and 20° C is

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Q. The coefficient of performance of a refrigerator working between $10^\circ C$ and $20^\circ C$ is

NTA AbhyasNTA Abhyas 2022

Solution:

$T_{1}=273+20=293 \, K, \, T_{2}=273+10=283 \, K$
Coefficient of performance
$=\frac{T_{2}}{T_{1} - T_{2}}=\frac{283}{293 - 283}=\frac{283}{10}=28.3$