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What will be the COP for heat pump?

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asked in TD by (215k points)
The thermal efficiency of a Carnot heat engine is 30%. If the engine is reversed in operation to work as a heat pump with operating conditions unchanged, then what will be the COP for heat pump?

(a) 0·30                        (b) 2·33

(c) 3·33

(d) Cannot be calculated

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