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?

A spherical shell made of plastic, contains a charge Q distributed uniformly over its surface. What is the electric field inside the shell? If the shell is hammered to deshape it without altering the charge. Will the field inside be changed? What happend if the shell is made of a metal?

A charge Q is uniformly distributed over a rod of length iota . Condider a hypothetical cube of edge iota 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.

What is the intensity of gravitational field at the center of spherical shell?

A thin. Metallic spherical shell contains s charge Q on it. A point charge q is placed at the centre of the shell and another charge q_1 is placed outside it as shown in figure (30-Q1). All the three charges are positive. The force on the charge at the centre is

A thin conducting ring of radius R is given a change +Q . The electric field at the centre O of the ring due to the charge on the part AKB of the ring is E. The electric field at the centre due to the charge on the part ACDB of the ring is:

A charge Q is uniformly distributed over a large plastic plate. The electric field at a point P close to the centre of the plate is 10V m^(-1) . If the plastic plate is replaced by a copper plate of the same geometrical dimension and carrying the same charge Q the electric field at the point P will become

A hollow insulated conducting sphere is given a positive charge of 10 mu C . What will be the electric field at the centre of the sphere is its radius is 2 meters ?

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 centre of the shell. What is the surface charge density on the inner and outer of the shell? b. Is the electric field inside a cavity (with not charge) zero, even if the shell is not spherical, but has any irregular shape? Explain.

A hollow metallic spherical shell carrying an electric charge produces no electric field at points :

A small sphere of radius r_1 and charge q_1 is enclosed by a spherical shell of radius r_2 and charge q_2 . Show that if q_1 is positive, charge will necessarily flow from the sphere to the shell (when the two are connected by a wire) no matter what the charge q_2, on the shell is.