#### 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: Option 1) 90 J Option 2) 1 J Option 3) 100 J Option 4) 99 J

As we learnt in

Coefficient of performance (beta) -

- wherein

For a perfect refrigerator

AND

Efficiency of a carnot cycle -

are in kelvin

- wherein

Source temperature

Sink Temperature

Correct option is 1.

Option 1)

90 J

This option is correct

Option 2)

1 J

This option is incorrect

Option 3)

100 J

This option is incorrect

Option 4)

99 J

This option is incorrect