The theory of electricity formed the opinion that Coulomb forces act only between charges. Actually, between opposite charges in metal conductors there is a zero potential of the conductor. And it is precisely this zero potential that is the central element of electricity, without which no current will run anywhere because the electric potential difference between the zero potential of the conductor and the negative (or positive) potential of the current source gives rise to the force of charges in the circuit, gives rise to EMF

СОСТОЯНИЕ И ПЕРСПЕКТИВЫ ИСТОРИКО-ЭКОНОМИЧЕСКИХ ИССЛЕДОВАНИЙ