Thermodynamics

JEE Main level, single correct, medium

189 of 190

Question 189 of 190

The temperature-entropy diagram of a reversible engine cycle is given in the figure. Its efficiency is

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Answer: (C) 1/31 / 3



η=ΔWQBC=S0 T023 S0 T02=1/3\eta=\frac{\Delta \mathrm{W}}{\mathrm{Q}_{\mathrm{BC}}}=\frac{\frac{\mathrm{S}_0 \mathrm{~T}_0}{2}}{\frac{3 \mathrm{~S}_0 \mathrm{~T}_0}{2}}=1 / 3

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