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Noun. 1. potential difference-the difference in electrical charge between two points in a circuit expressed in volts. electric potential, potential drop, voltage, potential. electrical phenomenon-a physical phenomenon involving electricity.
Electric Potential Energy. Potential energy can be defined as the capacity for doing work which arises from position or configuration. In the electrical case, a charge will exert a force on any other charge and potential energy arises from any collection of charges.pplication:Coulomb barrier for nuclear fusion Energy in electron volts. where k is Coulomb's constant. In electricity, it is usually more convenient to use the electric potential energy per unit charge, just called electric potential or voltage.