Question

An ideal gas expands along the path $AB$ as shown in the $p-V$ diagram. The work done is

• A. $4\times 10^{4}J$
• B. $1.2\times 10^{5}J$
• C. $2.4\times 10^{5}J$
• D. None of these

Answer 1

Answer: (B)

Work done = area of trapezium
$=\frac{1}{2}\times \left(8\times 10^5+4\times 10^5\right)\times 0.2$
$=1.2\times 10^{5}J$