current density field

current density field
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Англо-русский словарь по ядерным испытаниям и горному делу. 2013.

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  • Current density — This page is about the electric current density in electromagnetism. For the probability current density in quantum mechanics, see Probability current. Current density is a measure of the density of flow of a conserved charge. Usually the charge… …   Wikipedia

  • Field emission — (FE) is the emission of electrons from the surface of a condensed phase into another phase due to the presence of high electric fields. In this phenomenon, electrons with energies below the Fermi level tunnel through the potential barrier at the… …   Wikipedia

  • Current crowding — (also current crowding effect, or CCE) is a nonhomogenous distribution of current density through a conductor or semiconductor, especially at the vicinity of the contacts and over the PN junctions. Current crowding is one of the limiting factors… …   Wikipedia

  • Field electron emission — It is requested that a diagram or diagrams be included in this article to improve its quality. For more information, refer to discussion on this page and/or the listing at Wikipedia:Requested images. Field emission (FE) (also known as field… …   Wikipedia

  • Density functional theory — Electronic structure methods Tight binding Nearly free electron model Hartree–Fock method Modern valence bond Generalized valence bond Møller–Plesset perturbation theory …   Wikipedia

  • Field emission gun — A field emission gun is a type of electron gun in which the emitter tip is held at several kilovolts negative potential relative to a nearby electrode, so that there is sufficient potential gradient at its surface to cause field emission of… …   Wikipedia

  • Current sources and sinks — are analysis formalisms which distinguish points, areas, or volumes through which current enters or exits a system. While current sources or sinks are abstract elements used for analysis, generally they have physical counterparts in real world… …   Wikipedia

  • Current algebra — is a mathematical framework in quantum field theory where the fields form a Lie algebra under their commutation relations. For instance, in a non Abelian Yang–Mills symmetry, where ρ is the charge density, where f are the structure constants of… …   Wikipedia

  • Current sea level rise — This article is about the current and future rise in sea level associated with global warming. For sea level changes in Earth s history, see Sea level#Changes through geologic time. Sea level measurements from 23 long tide gauge records in… …   Wikipedia

  • Current sheet — The heliospheric current sheet results from the influence of the Sun s rotating magnetic field on the plasma in the interplanetary medium[1] A current sheet is an electric current that is confined to a surface, rather than …   Wikipedia

  • Field (physics) — The magnitude of an electric field surrounding two equally charged (repelling) particles. Brighter areas have a greater magnitude. The direction of the field is not visible …   Wikipedia


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