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JEE Main 202524 JanuaryEvening Shift
Exam
JEE Main
Year
2025
Date
24 January
Shift
Evening Shift
Subject
Physics
Chapter
Thermodynamics

JEE Main 2025 · 24 January · Evening Shift · Physics · Thermodynamics

The magnitude of heat exchanged by a system for the given cyclic...

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

Options

  1. A5π5 \pi
  2. B40π40 \pi
  3. C10π10 \pi
  4. Dzero

Correct answer

A. 5π5 \pi

Step-by-step solution

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