A heat engine has an efficiencyandeta;. Temperatures of source and sink are each decreased by 100 K. Then, the efficiency of the engine.a)Increasesb)Decreasesc)Remains constantd)Becomes 1Correct answer is option 'A'. Can you explain this answer?

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

a)
Increases
b)
Decreases
c)
Remains constant
d)
Becomes 1

Correct answer is option 'A'. Can you explain this answer?

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Verified Answer

A heat engine has an efficiencyη. Temperatures of source and sink ...

where T₁ and T₂ are the temperatures of a source and sink respectively.
When T₁ and T₂ both are decreased by 100 K each, (T₁ - T₂) stays constant. T₁ decreases.
∴ η increases.

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A heat engine has an efficiencyη. Temperatures of source and sink are each decreased by 100 K. Then, the efficiency of the engine.a)Increasesb)Decreasesc)Remains constantd)Becomes 1Correct answer is option 'A'. Can you explain this answer?

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