electric potential energy

is: the energy a charged particle has by virtue of its position in an electric field. [P3.1, P3.3, P4.1]

requires for its full definition: a position of zero electric potential energy to be arbitrarily chosen, since only differences in electric potential energy are physically meaningful. [P3.1, P3.3]

changes: in going from point A to point B, by an amount equal to the negative of the work done by the electric field when the charged particle is moved from A to B. [P3.1]

is exemplified: by the electric potential energy of a particle of charge in the electric field of a particle of charge when the distance between the two particles is Subject to the conventional choice that when this is given by

where is the permittivity of the medium between the charges. [P3.1, P3.3]

is related: to the electric potential in a region by so when a charge moves through a voltage difference (i.e. an electric potential difference) the change in electric potential energy is given by [P4.1]

often is referred: to as 'electrical energy' or electrostatic potential energy. [P3.1, P3.3]

has as its SI unit: the joule (J).