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Q.

Consider a Carnot refrigerator and a Carnot heat pump operating between the same two thermal energy reservoirs. If the COP of the refrigerator is 3.4 then the COP of the heat pump is

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a

2.4

b

1.7

c

3.4

d

4.4

answer is D.

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Detailed Solution

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From thermodynamics second law, the relation between COP 
of a Carnot refrigerator and heat pump is given as

(COP)heat pump=(COP)REF+1

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