Energy Stored In Capacitor - Practice Questions & MCQ

If there are capacitors in parallel connected to V volt source, then the energy stored is equal to:

The work done in placing a charge of  coulomb on a condenser of capacity 100 micro-farad is

A fully charged capacitor has a capacitance C. It is discharged through a small coil of resistance wire embedded in a thermally insulated block of specific heat capacity s and mass m. If the temperature of the block is raised by , the potential difference V across the capacitance is

A battery is used to charge a parallel plate capacitor till the potential difference between the plates becomes equal to the electromotive force of the battery. The ratio of the energy stored in the capacitor and the work done by the battery will be:

A parallel plate condenser with a dielectric of dielectric constant K between the plates has a capacity C and is charged to a potential V volt. The dielectric slab is slowly removed from between the plates and then reinserted. The net work done by the system in this process is

Let C be the capacitance of a capacitor discharging through a resistor R . Suppose is the time taken for the energy stored in the capacitor to reduce to half its initial value and is the time taken for the charge to reduce to one-fourth its initial value. Then the ratio / will be

A fully charged capacitor  with initial charge is connected to a coil of self-inductance L at The time at which the energy is stored equally between the electric and the magnetic fields is

The capacity of a condenser is  and its potential is. The energy released on discharging it fully will be?