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CGP EDU Academic Team
Published on: September 12, 2026
A Carnot's engine used first an ideal monoatomic gas then an ideal diatomic gas. If the source and sink temperature are $411^\circ \mathrm{C}$ and $69^\circ \mathrm{C}$ respectively and the engine extracts 1000 J of heat in each cycle, then area enclosed by the PV diagram is
Text Solution
Verified by ExpertsThe correct answer is:
C
$\eta = 1 - \frac{T_2}{T_1} = 1 - \frac{(273+69)}{(273+411)} = 0.5$
⇒ ⇒ Work done $= \eta \times Q = 0.5 \times 1000 = 500J$
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