Two metal spheres `A` and `B` of different sizes are charged such that the electric potential is the same at the surface of each. Sphere A has a radius three times that of sphere `B`. If `E_(A)` and `E_(B)` be the electric field magnitudes at the surface of each sphere, then `E_(B)//E_(A)` is

The answer to each of the following questions is a single-digit integer ranging from 0 to 9. Darken the correct digit. There are two metallic spheres A and B of radii R and 3R respectively. Both the spheres are given charge so that they may attain the same potential. If E_(A) is the electric field on the surface of sphere A and E_(B) is the electric field intensity on the surface of sphere B then calculate E_(A)//E_(B) .

Two spheres A and B of radius 'a' and 'b' respectively are at same electric potential. The ratio of the surface charge densities of A and B is

Two spheres A and B of radius 'a' and 'b' respectively are at same electric potential. The ratio of the surface charge densities of A and B is

The surface density on a copper sphere is sigma . The electric field strength on the surface of the sphere is

The surface density on a copper sphere is sigma . The electric field strength on the surface of the sphere is

A sphere of radius1 0 cm carries a charge of 1 mu C . Calculate the electric field at the surface of the sphere

Two spheres A and B of radius a and b respectively are at the same potential. The ratio of the surface charge density of A to B is

Two combining spheres A and B of radius a and b respectively are at the same potential. The ratio of the surface charge densities of A and B is ________.