Dr. Ahmed G. Abo-Khalil

Electrical Engineering Department

Current density

In physics, current density in general is a measure of the density of flow of a conserved charge, in other words flux of the charge (sometimes used synonymously). As such the term "current density" can also be applied to other conserved quantities, like mass, energy, chemical concentration, etc.[1]

In the context of electromagnetism, and related fields in solid state physics, condensed matter physics etc., the charge is electric charge, in which case the associated current density is the electric current per unit area of cross section. It is defined as a vector whose magnitude is the electric current per cross-sectional area. In SI units, the electric current density is measured in amperes per square metre.

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Almajmaah University

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