Linked from
The 12 pages that link to Electric potential energy, each with the reason it gives.
Coulomb's lawRelated: Integrating the force between point charges gives their interaction energy.
Electric potentialRelated: Dividing this energy by charge gives electric potential.
Equipotential surfaceRelated: Potential is this energy expressed per unit charge.
Electric potential differenceRelated: Voltage measures the change in this energy per unit charge.
Electrostatic forceRelated: Changes in this energy reveal the work done by electrostatic forces.