Find out the amount of the work done to separate the charges at infinite distance.

(a) Three point charges q,-4q and 2q are placed at the vertices of an equilateral triangle ABC of side 'l' as shown in the figure. Obtain the expression for the magnitude of the resultant electric force acting on the charge q. (b) Find out the amount of the work 4one to separate the charges at infinite distance.

Charges +q and -q are located at the corners of a cube of side as show in the figure. Find the work done to separate the charges to infinite distance

A system consists of two charges 4 mu C and -3 muC with no external field placed at (-5 cm, 0,0) and (0 cm, 0,0) respectively. The amount of work required to separated the two charges infinitely away from each other is

Two point charges 9 muC and -2muC are placed at a separation of 20 cm from each other. (i) Calculate the electric potential energy of this system of two charges. (ii) What amount of work is required to separate the particles to infinite separation?

(a) Use Gauss's theorem to find the electric field due to a uniformly charged infinitely Iarge plane thin sheet with surface charge density. Sigma (b) An infinitely large thin plane sheet has a uniform surface charge density + sigma . Obtain the expression for the amount of work done in bringing a point charge q from infinity to a point , distant r, in front of the charged plane sheet.

The ratio of the work done to the quantity of charge transferred .

Three point charges +Q, +2Q and -3Q are placed at the vertices of an equilateral triangle ABC of side l. If these charges are displaced at the find points A_(1), B_(1) and C_(1) respectively, find the amount of work done in shifting the charges to their new positions.

(a). Determine the potential energy of a system containing two charges 7muC and -2muC separated by a distance 18 cm. (b) How much work is needed to separate the two charges infinitely away from each other?