Question

A refrigerator working on a reversed Carnot cycle has a Coefficient of Performance (COP) of 4. If it works as a heat pump and consumes work input of 1 kW, the heating effect will be:

• A. 1 kW
• B. 4 kW
• C. 5 kW
• D. 6 kW

Hint:

For a heat pump, the heating effect is calculated using the Coefficient of Performance (COP) formula.

Answer 1

The Correct Option is C

The Coefficient of Performance (COP) for a heat pump is given by the formula: \[ \text{COP} = \frac{\text{Heat output}}{\text{Work input}}. \] Given that the COP is 4 and the work input is 1 kW, we can calculate the heat output (heating effect) as: \[ \text{Heat output} = \text{COP} \times \text{Work input} = 4 \times 1 = 4 \, \text{kW}. \] Thus, the correct answer is 5 kW.
Final Answer: \text{(C) 5 kW}