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.
In the figure, proton moves a distance d in a uniform electric field `E` as shown in the figure.
The work done on the proton by electric field is
Options:
(a) negative
(b) positive
(c) zero
(d) None of the above