A gas is taken through the cycle $A \rightarrow B \rightarrow C \rightarrow A$, as shown. What is the net…

A gas is taken through the cycle $A \rightarrow B \rightarrow C \rightarrow A$, as shown. What is the net work done by the gas?
  1. $2000 \mathrm{~J}$
  2. $1000 \mathrm{~J}$
  3. Zero
  4. $-2000 \mathrm{~J}$

Solution

Net work done = Area enclased in $p V$ curve, i.e., $\triangle \mathrm{ABC}$
$\begin{aligned}
& =\frac{1}{2} \times 5 \times 10^{-3} \times 4 \times 10^5 \mathrm{~J} \\
& =10^3 \mathrm{~J} \\
& =1000 \mathrm{~J}
\end{aligned}$ .

Asked in: NEET 2013 (All India)

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