Q134 / 180 · COMEDK 2023 (Memory Based) · Physics

A gas is taken through the cycle $A \rightarrow B \rightarrow C \rightarrow A$, as shown in figure. What is the net work done by the gas? Figure

  • A
    $2000 \mathrm{~J}$
  • Correct answer
    B
    $1000 \mathrm{~J}$
  • C
    Zero
  • D
    $-2000 \mathrm{~J}$

Solution

Net work done by the gas $=$ Area enclosed in $p-V$ curve, i.e. area of $\triangle A B C$. $W_{\text {net }}=\frac{1}{2} \times 5 \times 10^{-3} \times 4 \times 10^5 \mathrm{~J}=10^3 \mathrm{~J}=1000 \mathrm{~J}$

Hence, the correct answer is option: 'B'.

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