Deduce the expression for the potential energy of a system of two point charges `q_1 and q_2` brought from infinity to the points `vecr_1 and vecr_2` respectively in the presence of electric field `vecE`.

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.

Deduce an expression for the electric field vecE due to a system of two harges q_1 and q_2 with position vectors vecr_1 and vecr_2 at a oint vecr w.r.t the common origin O.

Derive an expression for electric field intensity at a distance r from a point charge q.

Find thr electric potential of a point if 2J of work is done in bringing a charge of 0.2C from infinity to that point.

Obtain an expression for potential energy of the configuration of three charges Hence generalise the result for a system of n point charges?

Point charges + 4q, -q and +4 q are kept on the X-axis at points x = 0, x = a and x = 2 a respectively

Fill ups Electric potential at a point is the …………….in moving a …………..charge from infinity to that point.

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