The coefficient of performance (COP) of a refrigerator working as a he

1.	The coefficient of performance (COP) of a refrigerator working as a heat pump is given by:
A.	\[{{(COP)}_{heat\,\,pump}}={{(COP)}_{refrigerator}}+2\]
B.	\[{{(COP)}_{heat\,\,pump}}={{(COP)}_{refrigerator}}+1\]
C.	\[{{(COP)}_{heat\,\,pump}}={{(COP)}_{refrigerator}}-1\]
D.	\[{{(COP)}_{heat\,\,pump}}={{(COP)}_{refrigerator}}\]
Answer» C. \[{{(COP)}_{heat\,\,pump}}={{(COP)}_{refrigerator}}-1\]

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The coefficient of performance (COP) of a refrigerator working as a heat pump is given by:

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