What is the coefficient of performance of a refrigerator? Let Q1 be the heat released to hot reservoir, Q2 be the heat extracted from a cold reservoir & W be the work done on the refrigerator.

What is the coefficient of performance of a refrigerator? Let Q1 be th

1.	What is the coefficient of performance of a refrigerator? Let Q₁ be the heat released to hot reservoir, Q₂ be the heat extracted from a cold reservoir & W be the work done on the refrigerator.
A.	Q<sub>1</sub>/W
B.	Q<sub>1</sub>/Q<sub>2</sub>
C.	Q<sub>2</sub>/W
D.	Q<sub>2</sub>/Q<sub>1</sub>
Answer» D. Q<sub>2</sub>/Q<sub>1</sub>