Current Density

(redirected from current densities)
Also found in: Dictionary, Medical.

Current density

A vector quantity equal in magnitude to the instantaneous rate of flow of electric charge, perpendicular to a chosen surface, per unit area per unit time. If a wire of cross-sectional area A carries a current I, the current density J is I/A. The units of J in the rationalized meter-kilogram-second system are amperes per square meter.

Current Density


a vector quantity whose magnitude is equal to the electric charge flowing per unit time per unit area, where the area is perpendicular to the direction of motion of the charge. If the charge density (the charge per unit volume) is equal to ρ, then the current density is j = ρv, where v is the average velocity of the ordered flow of the charges. When the distribution of the current density is uniform over the cross section of the conductor, the current I is equal to jS, where S is the cross-sectional area of the conductor.

current density

[′kər·ənt ‚den·səd·ē]
The current per unit cross-sectional area of a conductor; a specialization of the physics definition. Also known as electric current density.
A vector quantity whose component perpendicular to any surface equals the rate of flow of some conserved, indestructible quantity across that surface per unit area per unit time. Also known as current.
References in periodicals archive ?
Figure 6a shows the potential-time dependence for the deposition of zinc-nickel-iron alloys on steel rod at a low current densities range (0.
As such, to determine the actual current densities in the copper on the board, the temperature of the board must be known.
It is important to note that in case of higher supply frequency also higher induced currents arise, resulting in higher current densities.
NAGPREG (or NAGPREG5)--processing of the input data: computing the weight centers of the sub-domains and the current densities for the boulders.
13 shows returned values of corrosion current densities in the loaded and cracked control elements without inhibitor.
Should equation (10) not be true, then all of the current densities are scaled by the same factor so that equation (10) is true.
This challenge has been a stumbling block, because reducing the current densities to values where LEDs are more efficient is unacceptable.
Reduced conductivity at high polymerization current densities had been observed before [17] and is most likely caused by overoxidation due to overvoltage (see Fig.
The current density was thus shown to be a significant parameter in the electrodeionization process, and higher current densities could be considered for higher yields.
By contrast, ordinary household wiring carries current densities that reach only a few hundred amperes per square centimeter.
ECR specimens with high macrocell current densities, however, revealed coating deterioration caused by corrosion and exhibited numerous hairline cracks and blisters, along with reduced adhesion, coating disbondment (permanent adhesion loss), and underlying steel corrosion.