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प्रश्न
Answer in brief.
What sets the limits on the efficiency of a heat engine?
उत्तर
The efficiency of a heat engine is limited by the temperature of the cold reservoir.
Note: η = `1-"T"_"c"/"T"_"H"`
This formula shows that Tc should be as low as possible while TH should be as high as possible for maximum efficiency.
For a Carnot engine, efficiency
η = `1-"T"_"c"/"T"_"H"`. η → 1 as Tc → 0.
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