Thermodynamics NCERT Solutions Class 11 Physics - Solved Exercise Question 12.10

Question 12.10:

A refrigerator is to maintain eatables kept inside at 9°C. If room temperature is 36° C, calculate the coefficient of performance.

Solution:

Temperature inside the refrigerator, T₁ = 9°C = 282 K
Room temperature, T₂ = 36°C = 309 K
Coefficient of performance = T₁ / (T₂ - T₁)
= 282 / (309 - 282)
= 10.44
Therefore, the coefficient of performance of the given refrigerator is 10.44.