A charge Q is uniformly distributed on a thin spherical shell. What is the field at the centre of the shell? If a point charge is brought close to the shell, will the field at the centre change? Does your answer depend on whether the shell is conducting or nonconducting?

Charges q is uniformly distributed over a thin half ring of radius R . The electric field at the centre of the ring is

A charge Q is uniformly distributed over a rod of length l . Consider a hypothetical cube of edge l with the centre of the cube at one end of the rod. Find the minimum possible flux of the electric field through the entire surface of the cube.

Find charge on each spherical shell after joining the inner most shell outer most shell by a conducting wire. Also find charges on each surface.

A thin spherical conducting shell of radius R has a charge q. Another charge Q is placed at the centre of the shell. The electrostatic potential at a point P a distance R/2 from the centre of the shell is

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?

400 muC charge is uniformly spread over the surface of a spherical shell and surface density is 0.314 cm^(-2) . What is the radius of this shell ?

Two spherical , nonconducting and very tin shells of uniformly distributed positive charge Q and radius d are located a distance 10d from each other . A positive point charge q is placed inside one of the shells at a distance d//2 from the center, on the line connecting the centers of the two shells , as shown in the figure, What is the net force on the charge q ? .

A thin semi-circular ring of radius r has a positive charge q distributed uniformly over it. The net field vecE at the centre O is

A charge +Q is uniformly distributed over a thin ring with radius R . A negative point charge -Q and mass m starts from rest at a point far away from the centre of the ring and moves towards the centre. Find the velocity of this particle at the moment it passes through the centre of the ring .

Inside a uniformly charged spherical shell, electric field is ...... and electrostatic potential is .....