A point charge q is placed at the origin . How does the electric field due to the charge very with distance r from the origin ?

Electric field due to point charge

A charge Q is placed at the origin. The electric potential due to this charge at a given point in space is v . The work done by an external force in bringing another charge q from infinity up to the point is

A point charge Q is placed at the origin . Find the electrostatic energy stored outside the sphere of radius R centred at the origen.

A conducting shell of radius R carries charge -Q . A point charge +Q is placed at the centre. The electric field E varies with distance r (from the centre of the shell) as

A charge q = -2.0 muC is placed at origin. Find the electric field at (3 m, 4 m, 0) .

find the electric field strength due to a point charge of 5 muC at a distance of 80 cm from the charge.

A uniformly charged disc of radius R having surface charge density sigma is placed in the xy plane with its center at the origin. Find the electric field intensity along the z-axis at a distance Z from origin :