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Coulomb

(Science: physics) standard unit of electric charge representing one mole of electrons. A single electron or proton has a charge of (_/-) 1.60217733E-19 coulombs, with an uncertainty of.30 ppm. Hence there are 6.2414E_18 electrons in a coulomb of electrons. A unit of electrical charge equal to the amount of charge transferred by a current of 1 ampere in 1 second.