Find the electrostatic potential energy of the configuration of four charges +q,-q,+q and -q placed at the four corner A,B,C and D of a square of side r.

Find out the expression for the potential energy of a system of three point charges q_1, q_2 and q_3 located at vecr_1, vecr_2 and vecr_n w.r.t the common origin O.

Four charges +q'+q' - q and -q are placed respe tively at the four croners A,B,C and D respectively of a square of side a . Calcualte the force on a charge Q placed at the centre of the square.

Four points charges, each having a charge q are placed on the four corners. A,B,C and D of a regular pentagon. ABCDF. The distance of eadch corner for the centre is a. Find the electric field at the centre of the pentagon.

Show that electric potential = (Potential En ergy (U))/(Charg e(q)

In figure, the two graphs show the variation of electrostatic potential (V) with 1/r (r being distance of the field point form the point charge) for two point charges q_1 and q_2 What are the signs of the two charges?

Three charges, each equal to q, are placed at the three corners of a square of side a. Find the electric field at the fourth corner of the square.

Five point charges, each having a charge q are placed on the five croners A,B,C, D and E of a regular hexagon ABCDEF having each side of length a. Find the electric field at the centre of the hexagon.

A charge Q located at a point rarrr is in equilibrium under the combined electric field of three charges q_1, q_2 and q_3 if the charges q_1, q_2 are located at the points rarrr_1 and rarrr_2 respectively, find the direction of the force on Q, due to q_3 , in term of q_1,q_2,q_3 rarrr, rarrr_1, and rarrr_2

The two graphs drawn below show the variation electrostatic potential (V) with 1/r (r being distance of the field point from the point charge) for two point charges q_1 and q_2 What are the signs of the two charges?