Electrostatic Potential Energy
Electrostatic potential energy of a system of point charges is defined as the total amount of work done in bringing the different charges to their respective positions from infinitely large mutual separations.
By definition, work done in carrying charge from `oo` to any point is
W = Potential `xx` Charge
This work is stored in the system of two point charges in the form of electrostatic potential energy U of the system.
Three charges are placed at the vertex of an equilateral triangle of side `l` as shown in figure. For what value of `Q` the electrostatic potential energy of the system is zero?
Options:
(a) `-q`
(b) `q'/'2`
(c) `-2q`
(d) `-q'/'2`