Refrigeration and Freezing

The Coefficient of Performance ($COP$) of an ideal Carnot refrigerator operating between evaporator temperature $T_L$ and condenser temperature $T_H$ (in Kelvin) is:

Options:

• (A) $COP = \frac{T_L}{T_H - T_L}$
• (B) $COP = \frac{T_H - T_L}{T_L}$
• (C) $COP = \frac{T_H}{T_H - T_L}$
• (D) $COP = \frac{T_L}{T_H}$