A spherical conducting shell of inner radius `r_1` and outer radius `r_2` has a charge Q.
A charge q is placed at the centre of the shell. What is the surface charge density on the inner and outer surfaces of the shell ?

A spherical shell of charge +Q, has outer radius r_2 and inner radius r_1 . If a charge +q is placed at the centre of shell then what are the values of surface charge density of inner and outer surfaces?

A metallic shell of inner radius a and outer radius b is carrying a charge Q. Another point charge -q is placed at the centre of the shell. Then the electrostatic potential of the shell is (k=1/(4piepsilon_0))

A spherical conducting shell of inner radius r_1 and outer radius r_2 has a charge Q. Is the electric field inside a cavity (with no charge) zero, even if the shell is not spherical, but has any irregular shape? Explain.

+ q point charge is placed at the centre of a hemispherical surface. Amount of electrical flux crossing through th surface will be

A conducting sphere of radius R is given a charge Q. The electric potential and the electric field at the centre of the sphere respectively are

A conducting sphere of radius R is given a charge Q. The electric potential and the electric field at the centre of the sphere respectively are

A metal sphere of radius R carrying charge q is surrounded by a thick concentric metal shell of inner and outer radii a and b respectively. The net charge on the shell is zero. The potential at the centre of the sphere, when the outer surface of the shell is grounded will be