Embibe Experts Solutions for Chapter: Capacitance, Exercise 1: WBJEE 2019

The insulated plates of a charged parallel plate capacitor (with small separation between the plates) are approaching each other due to electrostatic attraction. Assuming no other force to be operative and no radiation taking place, which of the following graphs approximately shows the variation with time $\left(t\right)$ of the potential difference $\left(V\right)$ between the plates?

An electric bulb, a capacitor, a battery and a switch are all in series in a circuit. How does the intensity of light vary when the switch is turn on?

Five identical capacitors, of capacitance $20 \mathrm{\mu F}$ each, are connected to a battery of $150 \mathrm{V},$ in a combination as shown in the diagram. What is the total amount of charge stored?

A capacitor of capacitance $C$ is connected in series with a resistance $R$ and $DC$ source of emf $E$ through a key. The capacitor starts charging when the key is closed. By the time the capacitor has been fully charged, what amount of energy is dissipated in the resistance $R?$