A ball with charge -20e is placed at the centre of a hollow spherical shell has a net charge of -40e. What is the charge on the shell's 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 ?

Shown in the figure a spherical shell with an inner radius 'a' and an outer radius 'b' is made of conducting metarial. A charge +Q is placed at the centre of the spherical shell and a total charge -q s placed on the shell. Charge -q is districuted on the surfaces as :

A point charge is kept at the centre of a metallic insulated spherical shell. Then

A point charge is kept at the centre of a metallic insulated spherical shell. Then

Two concentric conducting shells A and B are of radii R and 2R . A charge + q is placed at the centre of the shells. Shell B is earthed and a charge q is given to shell A. Find the charge on outer surface of 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 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 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 conducting shell of inner radius r_(1) and outer radius r_(2) has a charge Q. (a) A charge q is placed at the center of the shell. What is the surface charge density on the inner and outer surfaces of the shell ? (b) Is the electric field intensity inside a cavity (with no charge) zero, even if the shell is not spherical, but has any irregular shape ? Explain.