Question

Consider the process on a system shown in figure. During the process, the work done by the system
(a) continuously increases
(b) continuously decreases
(c) first increases then decreases
(d) first decreases then increases.

Answer 1

(a) continuously increases

Work done by a system, $W=\int PdV$
Here,
P = Pressure on the system
dV = change in volume.

Since dV is positive, i.e. the volume is continuously increasing, work done by the system also continuously increases.