A charge Q coulomb is uniformly distributed over a sphere volume of radius R metres. What will be the expression for the energy of the system.

A charge +Q is uniformly distributed in a spherical volume of radius R. A particle of charge +q and mass m is projected with velocity v_0 from the surface of the spherical volume to its centre. The minimum value of v_0 such that it just reaches the centre (assume that there is no resistance on the particle except electrostatic force) of the spherical volume is

The classical concept of atomic structure is that negative charges are uniformly distributed inside a sphere of radius R keeping the nucleus of positive charge Ze at the centre of that sphere. An atom as a whole is electrically neutral. find out the electric field at a distance r from the nucleus, according do this atomic model.

Q charge is distributed uniformly through the volume of a sphere of radius R, The energy of the system will be—

A charge Q is uniformly distributed over a long rod AB of length L as shown in the figure. The electric potential at the point 0 lying at distance L from the end A is

Two identical thin rings, each of the radius R are coaxially placed at a distance R from each other. If Q_(1) and Q_(2) are the charges uniformly distributed on the rings, then calculate the work done in moving a charge q from the centre of one ring to the centre of the other.

The volume of a solid sphere of radius 2r units 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 spherical conductor of radius 12cm has a charge of 1.6times10^(-7)C distributed uniformly on its surface. What is the electric field : at a point18 cm from the centre of the sphere