How a capacitor works

A capacitor works in

The work done in increasing the potential of a capacitor from V volt to 2V volt is W Then, the work done in increasing the potential of the same capacitor from 2V volt to 4V volt will be.

A capacitor is filled with an insulator and a certain potential difference is applied to its pltaes. The energy stored in the capacitor is U . Now the capacitor is disconnected from the source and the insulator is pulled out of the capacitor. The work performed against the forces of electric field in pulling out the insulator is 4 U . Then dielectric constant of the insulator is.

Separation between the plates of a capacitor is increased from d to 2d while the battery remains connected with the plates. How will the stored energy in the capacitor change?

How many percent of work done by a battery is consumed to fully charge a capacitor which is stored as electric potential energy in the capacitor ?

During the process of charging a capacitor, some work is done which is stored in the form of

The plates of a parallel plate capacitor are charged with a battery so that the plates of the capacitor have acquired the P.D. equal to e.m.f of the battery. The ratio of the work done by the battery and the energy stored in capacitor is

At t=0 switch S is closed . (a) After how much time , charge on capacitor is 50% of maximum charge stored on capacitor. (b) After how much time, energy stored in capacitor is halt of maximum energy stored in capacitor.