A positive charge of `20 mu C` is placed 2 m away from a negative charge of `20 mu C`. Determine the electric field at a point 2 m away from each charges.

Calculate the electric field intensity at apoint 1m away from a charge of 1C in air.

A negative charge of 20 units is placed at a distance 50 cm away from a positive charge of 80 unit. Where will the electric field be zero on the line joining the two charges?

A point P, is 40 m away from charge 2 mu C and 20 m away from charge 4 mu C. Find the electric potential at point P. How much work to be done for a charge ot - 0.4 C brought from infinity to point P ?

Two charges of dipole +- 10 mu C are placed 1mm apart. Determine the electric field at a point on the axis of the dipole 10 cm away from its centre and at 10 cm away from centre on the equator of the dipole.