Electric potential energy or electric field potential refers to the amount of potential energy per unit of charge and it's measured in joules/coulomb. The electric potential energy of q in the potential of Q_{1} can be obtained with the potential energy formula. Here q_{N} (8.8541878176e-12 F/m) is the charge, ε_{0} is permittivity and r_{N} is the separation between the two point charges. Substitute the given values into the formula to find the electric potential energy of system of charges.

Where,

V = Electric Potential

q

ε

r

Make use of the above potential energy formula to find the electric potential energy of system of charges ie., the system connected with 'n' charge points (q_{1}, q_{2},....... q_{n}).