Electrostatics ...

Eight small drops, each of radius r and having same charge q are combined to form a big drop. The ratio between the potentials of the bigger drop and the smaller drop is

The capacitance of a spherical condenser is 1 µF. If the spacing between the two spheres is 1 mm then the radius of the outer sphere is

When air in a capacitor is replaced by a medium of dielectric constant K, the capacity

64 drops each having the capacity C and potential V are combined to form a big drop. If the charge on the smalldrop is q, then the charge on the big drop will be

The capacity of a parallel plate capacitor increases with the

The capacity of a spherical conductor in MKS system is

Can a metal be used as a medium for dielectric

The capacitance C of a capacitor is

The respective radii of the two spheres of a spherical condenser are 12 cm and 9 cm The dielectric constant of the medium between them is 6. The capacity of the condenser will be

Consider a parallel plate capacitor with plates 20 cm by 20 cm and separated by 2mm. The dielectric constant of the material between the plates is 5. The plates are connected to a voltage sources of 500 V. The energy density of the field between the plates will be close to