Four charges + q, –q, + q and –q are put together on four corners of a square as shown in figure. The work done by external agent in slowly assembling this configuration is

Four particles with charges 9muC, 10muC, 15muC and 20muC are placed at the corners of a square with side 10 cm as shown in the figure. Calculate the work done by an external agent in assembling the charges at their locations.

Four charges +q, -q, +q and -q are placed in order on the four consecutive corners of a square of side a. The work done in interchanging the positions of any two neighboring charges of the opposite sign is

Four point charges Q, q, Q and q are placed at the corners of a square of side 'a' as shown in the figure. Find the potential energy of this system?

Four charges +q, -1, +q and -q are placed in order on the four consecutive corners of a square of side a. The work done in interchanging the positions of any two neighbouring charges of the opposite sign is

Four point charges Q.q Q and q are placed at the corners of a square side 'a' as shown in the figures. Find the Potential energy of this system.

Four charge Q, q, Q and q are kept at the four corners of a square as shown below. What is the relation between Q and q, so that the net force on a charge q is zero ?

Four charge Q, q, Q and q are kept at the four corners of a square as shown below. What is the relation between Q and q, so that the net force on a charge q is zero ?