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Related to electrostatic unit: Electrostatic unit of charge
e·lec·tro·stat·ic u·nit (esu),
the unit in an absolute system (CGS) of units using static electricity; for example, statampere, statcoulomb, statfarad, stathenry, statvolt.
ESU or ESE (from the German elektrostatische Einheit)
Any electrical unit of measure based on the attraction or repulsion of a static charge, as distinguished from an electromagnetic unit, which is defined in terms of the attraction or repulsion of magnetic poles.
pertaining to static electricity.
a measure of electrical energy; abbreviated e.s.u. 1 e.s.u. = 2.08 × 109 electrons. Relative to radiological output 1 roentgen (R) = amount of x- or gamma radiation which produces 1 e.s.u./ml in dry air. See also coulomb (2).