Electrostatic potential of a homogeneously charged square and cube in two and three dimensions
arXiv:chem-ph/9508002
Abstract
A closed form of the electrostatic potential of a homogeneously charged cube is derived by integration. The exact result is compared with multipole expansions for the exterior and interior of the cube. The electrostatic potential of a homogeneously charged square in two-dimensional electrostatics is also determined.
5 pages, 1 Postscript figure, uses revtex.sty