NEET 2017 Physics question
A Carnot engine having an efficiency of as heat engine, is used as a refrigerator. If the work done on the system is 10 J, the amount of energy absorbed from the reservoir at lower temperature is
Answer: (2)
Solution
For a Carnot cycle run as a refrigerator the coefficient of performance is , where is the efficiency of the same cycle as an engine. . Also , where is the heat
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