. A Carnot engine has an efficiency of 1/6

When the temperature of the sink is reduced by 62ºC , its efficiency is doubled. The temperatures of the source and the sink are, respectively

A: 124ºC  ,62ºC

B: 37ºC  ,99ºC

C: 62ºC,124ºC

D: 99ºC  ,37ºC


Best Answer


The efficiency of the carnot’s engine can be given by



We can also write




Now Tsink=5/6×372K=310K=37ºC

Final answer:

The correct option is (D).⇒ ( Tsource=372K=99ºC

Now Tsink=5/6×372K=310K=37ºC ) 

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