Two heat engines are working in such a way that sink of one is source of the other. Their efficiencies are equal. Find the temperature of the sink of first if its source temperature is 927oC and temperature of sink of the second is 27oC.
A
327K
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B
357oC
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C
600oC
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D
600K
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Solution
The correct option is D600K Efficiency, η=1−T2T1=1−T3T2 Where, T1= temperature of first source, T2= temperature of first sink = temperature of second source, T3= temperature of second sink ⇒T2=√300×1200K=600K