Question
Write the main points of efficiency of Carnot engine.

Answer

Main points of efficiency :
(i) Efficiency does not depend on the working substance.
(ii) Efficiency is greater when the temperature difference between source and sink is greater. It occurs, but it is always less than $100 \%$.
(iii) The efficiency of the Carnot engine depend only on the temperature of the source and the sink
(iv) All reversible (ideal) engines working between two equal temperature have the same efficiency.

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