A charge Q is placed at the centre of an uncharged, hollow metallic sphere of radius alpha. (a) Find the surface charge density on the inner surface and on the outer surface. (b) If a charge q is put on the sphere, what would be the surface charge densities on the inner and the outer surface?

A charge Q is placed at the centre of an uncharged, hollow metallic sphere of radius a. (a) Find the surface charge density on the inner surface and on the outer surface. (b) If a charge q is put on the sphere, what would be the surface charge densities on the inner and the outer surface? (c) Find the electric field inside the sphere at a distance x from the centre in the situations (a) and (b).

A point charge +q is placed at the centre of a conducting spherical shell of inner radius a and outer radius b. Find the charge appearing on the inner and outer surface of the shell.

A metal spherical shell has an inner radius R_(1) and outer radius R_(2) . A charge Q is placed at the center of the spherical cavity. What will be surface charge density on (i) the inner surface, and (ii) the outer surface ?

A ball with charge -50 e is placed at the centre of a hollow spherical shell has a net charge of -50e . What is the charge on the shell's outer surface ?

A charge 'Q' is placed at the centre of a hemispherical surface of radius 'R'. The flux of electric field due to charge 'Q' through the surface of hemisphere is

Two charged spheres of radii R_(1) and R_(2) having equal surface charge density. The ratio of their potential is

A metallic spherical shell has an inner radius R_(1) and outer radius R_(2) . A charge is placed at the centre of the spherical cavity. The surface charge density on the inner surface is

A Charge of 4 xx 10^(-8) C is distributed uniformaly on the surface of a sphere of radius 1 cm. It is covered by a concentric, hollow conducting sphere of radius 5 cm. (a) Find the electric field at a point 2 cm away from the centre. (b) A charge of 6 xx 10^(-8)C is placed on the hollow sphere. Find the surface charge density on the outer surface of the hollow sphere.

The magnitude of the electric field on the surface of a sphere of radius r having a uniform surface charge density sigma is