American Journal of Electrical and Electronic Engineering. 2014, 2(5), 146-151DOI:
Abstract: The contact potential difference this is the potential difference, which appears between the located in the electrical contact conductors under the thermodynamic equilibrium conditions. As a result this between the conductors occurs the electron transfer until the Fermi levels in both conductors are made even. The established contact potential difference is equal to difference the work function of conductors, referred to the electron charge. In the article is described the new type of contact potential difference, which appears with the flow of the current through conductors. Contact the potential difference indicated depends on the strength of current, which flows through conductor; therefore it it is possible to name aelektrocurent contact potential difference. The results of investigating the electrification of the superconductive windings and tori during the introduction in them of direct currents are represented. Are proposed the schematics of magnetometers, which make it possible to measure the magnetic fields over a wide range of their values.