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Question: Answered & Verified by Expert
The temperature-entropy diagram of a reversible engine cycle is given in the figure. Its efficiency is

PhysicsThermodynamicsJEE MainJEE Main 2005
Options:
  • A
    $1 / 2$
  • B
    $1 / 4$
  • C
    $1 / 3$
  • D
    $2 / 3$
Solution:
2441 Upvotes Verified Answer
The correct answer is:
$1 / 3$


$\eta=\frac{\Delta \mathrm{W}}{\mathrm{Q}_{\mathrm{BC}}}=\frac{\frac{\mathrm{S}_0 \mathrm{~T}_0}{2}}{\frac{3 \mathrm{~S}_0 \mathrm{~T}_0}{2}}=1 / 3$

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