The Carnot co-efficient of performance (COP) of a domestic air conditioner compared to a household refrigerator is
A
Less
B
More
C
Same
D
Dependent on climatic conditions
Correct Answer: Less
The COP of a domestic air conditioner is less than that of household refrigerator because the work input in case of domestic air conditioner is higher than refrigerator $${\bf{cop}} = \frac{{{\text{desired output}}}}{{{\text{work input}}}}.$$