Co-efficient of performance of a Carnot cycle refrigerator operating between - 23°C and + 27°C is ________________?
Correct answer: B. 5
- A. 3
- B. 5
- C. 0.5
- D. 1.5
Explanation
For a Carnot refrigerator, COP equals Tₗ/(Tₕ−Tₗ), using absolute temperatures. Here Tₗ=250 K and Tₕ=300 K, giving COP=250/50=5.
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