current density
n.
► Symbol j, J Electricity. A vector quantity whose magnitude is the ratio of the magnitude of current flowing in a conductor to the cross-sectional area perpendicular to the current flow and whose direction points in the direction of the current.
► Physics. The number of subatomic particles per unit time crossing a unit area in a designated plane perpendicular to the direction of movement of the particles.

[TahlilGaran] American Dictionary ▲