dikca -dic- gismu

x1 is electricity [electric charge or current] in/on x2 of polarity/quantity x3 (def. negative).

(x3, a quantifier, can be expressed as a simple polarity using the numerals for positive and negative ma'u and ni'u); (explicitly) negative (= dutydikca), positive (= mardikca); current (= (sel)muvdikca; again default negative/electron current), charge (= klodikca, stadikca). See also lindi, xampo, flecu, maksi, tcana.

In notes:

x1 is a current/flow/river of/in x2 flowing in direction to/towards x3 from direction/source x4.
x1 is lightning/electrical arc/thunderbolt striking at/extending to x2 from x3.
x1 is magnetic [adjective] producing magnetic field x2.
x1 is a station/node of/in/on transport/communication/distribution system/network x2.
x1 is x2 ampere(s) [metric unit] in current (default is 1) by standard x3.
g3=d2 is an electric lamp illuminating g2 with light g1.
d1 is positive electric charge in d2.
x1 pertains/is related to/reflects (the) electromagnetic interaction [E&M fundamental interaction] in manner/with properties/in state/with realization x2, coupling to x3 in manner/with strength x4
x1 (object) has charge x2 (number) in units x3 for interaction/of type x4 and in/by/using convention x5
x1 is electronic, operating on the physical behavior of electrons
x1 is measures equal to/is an elementary negative electric charge [-e; negative of the charge of the proton, id est the charge of the electron] in electric charge, under signum convention x2 (default: proton has positive charge)
x1 is measures equal to/is a quantum negative electric charge [-e/3; electric charge of a down quark] in electric charge, under signum convention x2 (default: proton has positive charge)
x1 is a physically-required conserved quantity in an ideal closed system such that it is associated with (Noetherian) symmetry/Hamiltonian-commuting observable/deterministic feature/law/property/aspect x2, applicable under conditions/in universe/in metaphysics x3
x1 emits light characteristic of/is of the color that is described by/(as) arising from/associated with the approximately twenty-one centimeter wavelength, hydrogen hyperfine proton/electron spin-flip transition (from parallel to antiparallel configuration, id est: from the higher energy state to the lower energy state), electromagnetic radiation