# Revision history of "Electrostatic energy"

• (cur | prev) 00:46, 25 August 2019Kjlee (talk | contribs). . (2,834 bytes) (+2,834). . (새 문서: ===Energy of a system of charges=== If one has two point charges $q_i$ and $q_j$, the potential energy of this pair is ::[itex]U_{ij} = \frac1{4\pi\epsilon_0}...)