Q.

A heat engine employing a Carnot cycle with an efficiency of η=10% is used as a refrigerating machine, the thermal reservoirs being the same. The refrigerating efficiency ∈ is:

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a

12

b

8

c

110

d

9

answer is D.

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Detailed Solution

∈=1η-1=10.1-1=9
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A heat engine employing a Carnot cycle with an efficiency of η=10% is used as a refrigerating machine, the thermal reservoirs being the same. The refrigerating efficiency ∈ is: