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 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 resultant electric force on a charge Q?

Four point charges are placed at the four corners of a square in the two ways as shown in the fig. electric potential at the centre of the square be the same or difference in the two configurations and why?

Five charges, q each, are placed at the corners of a regular pentagon of side a as shown in the figure. What will be the electric field at O, the centre of the pentagon? What will be the electric field at O, fi the charge from one of the corners (Say A) is removed? What will be the electric field at O, if the charge q at A is repalced by - q?

Four point charges are placed at the four corners of a square in the two ways as shown in the fig. Will the electric field at the centre of the square, be the same or different in the two configurations and why?

Four point charges are placed at the four corners of a square in the two ways (a) and (b) as shown figure. Will the Electric potential at the centre of the square be the same or different in the two configurations and why?

Five charges, q each, are placed at the corners of a regular pentagon of side a as shown in the figure. How would your answer to be affected, if pentagon is replaced by n-sided regular polygon with charge q at each of its corners?

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.

Two point charges q_1 and q_2 are kept at a distance of r_(12) in air. Deduce the expression for the electrostatic potential energy of the system.

Three charges -q, Q and -q are placed at equal distances on a striaght line. If the potential energy of the system of three charges is zero, then what is the ratio of Q:q?

Shown in the figure four point charges at the corners of a square of side 2 cm. Find the magnitude and direction of the electric field at the centre O of the square, if Q = 0.02 muC Use 1/(4piepsilon_0) = 9 xx 10^9 N m^2 C^-2