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Current density

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

 


Explanation

It is a vector quantity that plays a role in electromagnetic field theory and thus also in the Maxwell equations.

 


Example 1

The Maxwell equation of the electric current density is

where

    ∇× Rotation
    H Magnetic field strength
    D Electric displacement
    t Time
    J Electric current density

 


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