The parallel plate capacitors of capacitances C and 2C are connected in parallel and charged to a potential difference V by a battery. The battery is the disconnected and the space between the plates of capacitance C is filled with a dielectric of dielectric constant K. Find the potential difference across the combination now.

Two parallel plate capacitors of capacitances C and 2C are connected in parallel and charged to a potential difference V. The battery is then disconnected and the region between the plates of the capacitor C is completely filled with a material of dielectric constant k. What is the potential difference across the capacitors now?

Two parallel plate capacitors of capacity C and 2C are connected in parallel and charged to a potential difference V. The battery is then disconnected and the space between the plates of the capacitor C is completely filled with a material of dielectic constant K. What is the final potential difference across the capacitors?

The figure shows two identical parallel plate capacitor connected to a battery with the switch S closed. The switch is now opened and the free space between the plates of the capacitor is filled with a dielectric of dielectric constant 3. Find the ratio of the total electrostatic energy stored in both capacitors before and after the introduction of the dielectric.

A capacitor of capacitance C is charged to a potential difference V_0 . The charging battery is disconnected and the capacitor is connected to a capacitor of unknown capacitance C_x . The potential difference across the combination is V. The value of C_x should be

A parallel plate capacitor of plate area A and plate separation d is charged to a potential difference V and then the battery is disconnected. A slab of dielectric constant k is then inserted between the plates of the capacitor so as to fill the space between the plates. If Q, E and W denote respectively the charge on each plate, the electric field between the plates and the work done in the process of inserting the slab, then

A parallel plate capacitor has capacitance C. If it is equally filled with parallel layers of materials of dielectrics K_1 and K_2 —

A parallel plate capacitor is connected across a 2V battery and charged. The battery is then disconnected and glass slab is introduced between the plates. Which of the following pairs of quantities decrease ?

The space between parallel plates of a parallel plate capacitor C is filled with a oil of dielectric constant k = 2. If the oil is removed, then what will be the capacitance of the capacitor—

A parallel plate air capacitor has capacity 'C' distance of separation between plates is ‘d’ and potential difference 'V' is applied between the plates. Force of attraction between the plates of the parallel plate air capacitor is

A capacitor of capacitance C is charged to a potential difference V from a cell and then disconnected from it. A charge +Q is now given to its positive plate. The potential difference across the capacitor is now