In the circuit shown in the figure, there are two parallel plate capacitors each of capacitance C . The switch $\mathrm{S}_1$ is pressed first to fully charge the capacitor $\mathrm{C}_1$ and then released. The switch $\mathrm{S}_2$ is then pressed to charge the capacitor $C_2$. After some time, $S_2$ is released and then $S_3$ is pressed. After some time.
