Question

A refrigerator works between temperature $-10^{\circ }C$ and $27^{\circ }C$, the coefficient of performance is :

• A. 7.1
• B. 1
• C. 8.1
• D. 15.47

Answer 1

Answer: (A)

$COP=\frac{T_2}{T_1-T_2}$
$T_1=300K$
$T_2=263K$
$COP=\frac{263}{300-263}$
$=7.1$