A parallel plate capacitor is connected to $15 \mathrm{V}$ battery and charged. The battery is then disconnected and a glass slab is introduced between the plates. Then the quantities that decrease are :-

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 $R?$

The potential differences that must be applied across the parallel and series combination of $3$ identical capacitors is such that the energy stored in them becomes the same. The ratio of potential difference in parallel to series combination is

Taking the examples of charging capacitor, name the currents that are responsible for the process of charging and also state which current flow outside and which flow inside the capacitor?

A parallel plate capacitor is charged by a battery, which is then disconnected. A dielectric slab having dielectric constant(relative permittivity) $K$, is now introduced between its two plates in order to occupy the space completely. State, in terms of $K$, its effect on the energy stored in the capacitor.

In the circuit given below, the capacitor $C$ is charged by closing the switch $S_1$ and opening the switch $S_2$. After charging, the switch $S_1$ is opened and $S_2$ is closed, then the maximum current in the circuit