There are three concentric hollow spheres of radii a , b and c and they are charged with charges `q_1, q_2 ` and `q_3` respectively. Calculate the potentials of each of the spheres

There are four concentric shells A, B, C and D of radii a, 2a, 3a and 4a respectively. Shells B and D are given charges +q and -q respectively. Shell C is now earthed. The potential difference V_A-V_C is

Three concentric metal shells A, B, and C of respective radii a,b and c (a lt b lt c) have surface charge densities +sigma, -sigma and +sigma respectively. The potential of shell B is

Figure shows three concentric thin spherical shells A, B and C. They have radii R, 2R and 3R. The shell B is earthed and A and C are given charges q and 2q respectively. Then, the total charge on B is

A charge Q is distributed over two concentric hollow spheres of radius r and R(gtr) such that the surface densities are equal. The potential at the common centre is

A metal sphere of radius R carrying charge q is surrounded by a thick concentric metal shell of inner and outer radii a and b respectively. The net charge on the shell is zero. The potential at the centre of the sphere, when the outer surface of the shell is grounded will be

Charge Q is distributed between two concentric hollow sphere placed in vacuum in such a way that their surface densities of charges are equal. If the radii of the two spheres be r and R (R gt r), calculate the potential at their centre.

A solid and a hollow sphere of same diameter are charged to a same potential. Then—