current density

current density

n.

1. 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.

2. 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.

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current density

n

(Physics / General Physics) the ratio of the electric current flowing at a particular point in a conductor to the cross-sectional area of the conductor taken perpendicular to the current flow at that point. It is measured in amperes per square metre. Symbol J