What is the intensity of the electric field at the centre of a charged ring?

What is the intensity of electric field inside a charged spherical shell?

A circular copper ring of radius r, placed in vacuum, has a charge q on it. Find out the electric fields at the centre of the ring.

A thin half- ring of radiusb 20 cm is uniformly charged with a total charge of 0.7 nC . Find the magnitude of the electric field at the centre of the centre of the half-ring.

An isolated solid metal sphere of radius R is given an electric charge. The variation of the intensity of the electric field with the distance r from the centre of the sphere is best shown by

An isolated solid metal sphere of radius R is given an electric charge. The variation of the intensity of the electric field with the distance r from the centre of the sphere is best shown by

Show that the intensity of the electric field at an external point due to a uniformly charged thin spherical shell is the same as if the whole charge were situated at its centre.

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: