- the amount of current flowing through a given cross-sectional area in a given time interval: usually measured in amperes per square centimeter.
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Examples from the Web for current density
The dependence of the mechanical qualities of the copper upon the current-density employed is well known.
- 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 metreSymbol: J