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

When air is replaced by a dielectric medium of constant K, the maximum capacitance of the capacitor

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 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 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 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 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