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Question

A Carnot engine absorbs Q1 amount 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
Q1/4
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B
Q1/3
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C
Q1/2
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D
2Q1/3
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Solution

The correct option is B Q1/3
Q1=W+Q2
η=WQ1
η=1Q2Q1
For reversible engine Q depends only on temperature.
So, η=1T2T1

η=1Q2Q1=1T2T1
Q2=Q13

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