electromagnetism, current density is the amount of charge per unit time that flows through a unit area of a chosen cross section. The current density vector is...

In electrochemistry, exchange current density is a parameter used in the Tafel equation, Butler–Volmer equation and other electrochemical kinetics expressions...

hydrodynamics and electric currents in electromagnetism. As in those fields, the probability current (i.e. the probability current density) is related to the...

Wiktionary, the free dictionary. Current density Displacement current (electric) and Magnetic current § Magnetic displacement current Electric shock Electrical...

Displacement current density has the same units as electric current density, and it is a source of the magnetic field just as actual current is. However...

Density (volumetric mass density or specific mass) is a substance's mass per unit of volume. The symbol most often used for density is ρ (the lower case...

general relativity, the four-current (technically the four-current density) is the four-dimensional analogue of the current density, with units of charge per...

electromagnetism, polarization density (or electric polarization, or simply polarization) is the vector field that expresses the volumetric density of permanent or induced...

electromagnetism, charge density is the amount of electric charge per unit length, surface area, or volume. Volume charge density (symbolized by the Greek...

x} , J ( x ) {\displaystyle J(x)} is the current density at the point x {\displaystyle x} . The current density is parallel to the electric field by necessity...

In electromagnetism, an eddy current (also called Foucault's current) is a loop of electric current induced within conductors by a changing magnetic field...

the cathodic partial current density ic (positive) and the anodic partial current density ia (negative) gives the net current density i: i = ic + ia In the...

there is a drift current) until the density gradient builds up enough for the diffusion current to exactly balance the drift current. So at equilibrium...

cross-sectional area of the disc and the current density. The equation for the on-axis magnetic flux density of a Bitter disc becomes much more complex...

This is a list of countries and dependencies ranked by population density, sorted by inhabitants per square kilometre or square mile. The list includes...

Current density imaging (CDI) is an extension of magnetic resonance imaging (MRI), developed at the University of Toronto. It employs two techniques for...

of magnetic fields (B, H), electric fields (E, D), charge density (ρ), and current density (J) is described by Maxwell's equations. The role of the magnetization...

of a few skin depths. The skin depth is the thickness at which the current density is reduced by 63%. Even at relatively low frequencies used for power...

functional or by the inclusion of additive terms, is a current research topic. Classical density functional theory uses a similar formalism to calculate...

tendency of an alternating electric current (AC) to become distributed within a conductor such that the current density is largest near the surface of the...

B or H magnetic fields. These two forms use the total current density and free current density, respectively. The B and H fields are related by the constitutive...

{\displaystyle \mathbf {J} =\sigma \mathbf {E} ,} where J is the current density at a given location in a resistive material, E is the electric field...

magnetic flux density B at position r in 3D-space generated by a filamentary current I (for example due to a wire). A steady (or stationary) current is a continual...

current. Magnetic currents produce an electric field analogously to the production of a magnetic field by electric currents. Magnetic current density...

Population density (in agriculture: standing stock or plant density) is a measurement of population per unit land area. It is mostly applied to humans...

ρ {\displaystyle \rho } the electric charge density and J {\displaystyle \mathbf {J} } the current density. ε 0 {\displaystyle \varepsilon _{0}} is the...

_{\mathrm {f} }\times {\hat {\mathbf {n} }},} where Kf is the surface free current density and the unit normal n ^ {\displaystyle {\hat {\mathbf {n} }}} points...

Physics. Harcourt. p. 20. ISBN 0-03-083993-9. We define the thermal current density j q {\displaystyle {\bf {j}}^{q}} to be a vector parallel to the direction...

Particle density (particle count), number of particles per unit volume Area-specific quantity, the quotient of a physical quantity and area Current density, the...

streams Convection current, flow caused by unstable density variation due to temperature differences Current (mathematics), geometrical current in differential...