Question

An ideal gas is taken through the cycle, as shown in the figure. If the net heat supplied to the gas in the cycle is 5J, the work done by the gas in the process $C\to A$ is

• A. $-5J$
• B. $-10J$
• C. $-15J$
• D. $-20J$

Answer 1

The correct option is A $-5J$

$\text{Solution}:$

For cyclic process,

$Q_{cyclic} = W_{AB}+W_{BC}+W_{CA} =10J+0+W_{CA}=5J

$⟹W_{CA}=-5J$

$\text{Hence A is the correct option}:$