Question

The coefficient of performance of a refrigerator is 5. If the temperature inside freezer is -20°C, the temperature of the surroundings to which it rejects heat is

(a) 11°C

(b) 21°C

(c) 31°C

(d) 41°C

Answer 1

Correct option (c) 31°C

Explanation:

The coefficient of performance of a refrigerator is