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An ideal heat engine working between temperature $T_{1}$ and $T_{2}$ has an efficiency $η$ , the new efficiency if both the source and sink temperature are doubled, will be

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η2

2η

3η

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detailed solution

Correct option is B

In first case η1 = T1-T2T1In second case η2 = 2T1-2T22T1 = T1-T2T1 = η

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An ideal heat engine working between temperature T1 and T2 has an efficiency η, the new efficiency if both the source and sink temperature are doubled, will be

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An ideal heat engine working between temperature $T_{1}$ and $T_{2}$ has an efficiency $η$ , the new efficiency if both the source and sink temperature are doubled, will be