Electric potential energy, or electrostatic potential energy, is a potential energy (measured in joules) that results from conservative Coulomb forces and is associated with the configuration of a particular set of point charges within a defined system.
The term "electric potential energy" is used to describe the potential energy in systems with time-variant electric fields, while the term "electrostatic potential energy" is used to describe the potential energy in systems with time-invariant electric fields.
Read more about Electric Potential Energy: Definition, Units, Energy Stored in An Electrostatic Field Distribution, Energy in Electronic Elements
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—Charles Sanders Peirce (1839–1914)