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Questions  

A Carnot engine absorbs an amount Q of heat from a reservoir at an absolute temperature T and rejects heat to a sink at a temperature of T/3. The amount of heat rejected is 

a
Q / 4
b
Q / 3
c
Q / 2
d
2Q / 3

detailed solution

Correct option is B

η=1−T2T1,1−T3T=WQ1⇒23=1−Q2Q1⇒Q2Q1=13⇒Q2=Q3

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