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A carnot engine having an efficiency of ...

A carnot engine having an efficiency of `1/4` is being used as a refrigerator. If the work done on the refrigerator is 5 J, the amount of heat absorbed from the reservoir at lower temperature is:

A

`9J`

B

`12 J`

C

`20 J`

D

`15 J`

Text Solution

Verified by Experts

The correct Answer is:
D
Refrigerator cycle is:
`eta=W/Q_(+)=W/(W_+Q)," "1/4 = 5/(5+Q)," "Q=15J`
Heat absorbed from the reservoir at lower temperature is 15 J.
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