Thermodynamics

JEE Main level, single correct, medium

26 of 190

Question 26 of 190

The magnitude of heat exchanged by a system for the given cyclic process ABCA (as shown in figure) is (in SI unit) :

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Answer: (A) 5π5 \pi



W=12πR2=12×π×(2002×103)×2002×10−6=10π2=5π J\begin{aligned} & \mathrm{W}=\frac{1}{2} \pi \mathrm{R}^2 \\ & =\frac{1}{2} \times \pi \times\left(\frac{200}{2} \times 10^3\right) \times \frac{200}{2} \times 10^{-6} \\ & =\frac{10 \pi}{2}=5 \pi \mathrm{~J}\end{aligned}

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