Fill ups
A point charge is placed at the centre of a hollow conducting sphere of internal radius 'r' and outer radius '2r'. The ratio of the surface charge density of the inner surface to that the outer surface will be…………….. .

A point charge +Q is placed at the centre O of an uncharged hollow spherical conductor of inner radius 'a' and outer radius 'b'. Find the following: The magnitude and sign of the charge induced on the inner and outer surface of the conducting shell.

A point charge +Q is placed at the center O of an uncharged hollow spherical conductor of inner radius 'a' and outer radius 'b'. Find the following: The magnitude of electric field vector at a distance (i) r=a/2 and (ii) r=2b from the centre of the shell.

Show that charge always resides on the outer surface of a conductor.

A point object is placed at the centre of a glass sphere of radius 6 cm and refractive index 1.5.The distance of the virtual image from the surface of the sphere is

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?

Fill ups The curved surface area of a hollow cylinder of height h with external and internal radius as R and r is……………. .

A uniformly charged conducting sphere of 2.8 m in diameter has a surface charge density of 100muCm^-2 . Find the charge on the sphere.

Find the radius of a sphere whose surface area is 154 cm^2 .

find the radius of a sphere whose surface area is 154 cm^(2)