The energy required to charge a parallel plate condenser of plate separtion `d` and plate area of cross-section `A` such that the unifom field between the plates is `E` is

To reduce the capacity of a parallel plate condenser, separation between the plates is

In a parallel-plate capacitor of plate area A , plate separation d and charge Q the force of attraction between the plates is F .

A parallel plate condenser is immersed in an oil of dielectric constant 2 . The field between the plates is

The distance between the plates of a parallel plate condenser is d. If a copper plate of same area but thickness d/2 is placed between the plates then the new capacitance will become -

A potential difference of 50 V is maintained between the two plates of a parallel plate condenser, separated by 5 mm of air. The energy stored in unit volume of air between the plates of the condenser is

The distance between the plates of a parallel plate condenser is 4mm and potential difference is 60 volts. If the distance between the plates is increased to 12mm , then