" Electric field intensity due to a point charge " "q" ' at a distance 'r' from it is "

The magnitude of electric field intensity due to a point charge is 10 N/C at a distance 1 m from it. Calculate the magnitude of charge.

Derive an expression for electric field intensity due to a point charge in a material medium.

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

The electric field due to a point charge at a distance R from it is E. If the same charge is placed on a metallic sphere of radius R , the electric field on the surface of the sphere will be nE , then the value of n is

The electric field intensity at a point located at distance r(r lt R) from the center of a spherical conductor (radius R) charged Q will be-

Electric field intensity at a point B due to a point charge Q kept at point A is 24 NC^(-1) , and electric potential at B due to the same charge is 12 JC^(-1) . Calculate the distance AB and magnitude of charge.