In a spherical capacitor of inner radius a and outer radius 2a dielectric strength of medium is `E_(0)` .The maximum potential to which capacitor can be charged is

A point charge Q is placed inside a conducting spherical shell of inner radius 3R and outer radius 5R at a distance R from the centre of the shell. The electric potential at the centre of the shell will be

A point charge Q is located at the centre of a hollow spherical conductor having inner radius as R_(1) and outer radius R_(2) . The conductor being uncharged initially. The potential at the inner surface will be

A point charge q is placed inside a conducting spherical shell of inner radius 2R and outer radius 3R at a distance of R fro the centre of the shell. The electric potential at the centre of shell will (potential at infinity is zero).

A point charge q is placed inside a conducting spherical shell of inner radius 2 R and outer radius 3 R at a distance of R from the center of the shell. Find the electric potential at the center of the shell.

A and C are concentric conducting spherical shells of radius a and c respectively.A is sueeounded by a concentric dielectric medium of inner radius a, outer radius b and dielectric constant k. If sphere A is given a charge Q, the potential at the outer surface of the dielectric is

A parallel plate capacitor has a plate separation of 2mm and use a dielectric (whose dielecric strength is 200 kV//cm) as an insulator. The maximum potential difference that can be applied to the terminals of the capacitor is

A solid spherical conducting shell has inner radius a and outer radius 2a. At the center of the shell is located a point charge +Q . What must the excess charge of the shell be in order for the charge density on the inner and outer surface of the shell to be exactly equal?

A spherical capacitor has an inner sphere of radius 9 cm and an outer sphere of radius 10 cm. the outer sphere is earthed and the inner sphere is charged. What is the capacitance of the capacitor?