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Q.

A heat engine has an efficiency . Temperatures of source and sink are each decreased by 100K. Then, the efficiency of the engine

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a

Increases

b

Decreases

c

Remains constant

d

Becomes 1

answer is A.

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Detailed Solution

Assuming source and sink temperature to be T1 and T2Once the temperatures have been decreased by 100k
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A heat engine has an efficiency . Temperatures of source and sink are each decreased by 100K. Then, the efficiency of the engine