A conducting sphere of radius 10 cm has an unknown charge. If the electric field 20 cm from the centre of the sphere is `1.5xx 10^3N//C` and points radially inward, what is the net charge on the sphere?

Can a metal sphere of radius 1 cm hold a charge of 1 C?

A non-conducting solid sphere of radius R is uniformly charged. The magnitude of the electric field due to the sphere at a distance r form its centre

Find the surface area of the sphere of radius: 10.5 cm

A small sphere carries a charge of 20muC. The energy density of electric field at a point 25 cm away from the centre of the sphere in air is

A sphere of charge of radius R has uniform volume charge density. The electric field due to the sphere of charge at a point

A hollow metal sphere of radius 5 cm is charged, such that the potential on its surfae is 10 V. The potential at the centre of the sphere is

A hollow metallic sphere of radius 10 cm is charged, such that potential of its surface is 70 V. The potential at the centre of the sphere would be

Two charged conducting spheres of radii a and b are connected to each other by a wire. What is the ratio of electric fields at the surfaces of the two spheres? Use the result obtained to explain why charge density on the sharp and pointed ends of a conductor is higher than on its flatter portions.