# Current Density

Written by Jerry Ratzlaff on . Posted in Electromagnetism

Current density is the measure of current per unit of cross section.

### Current Density Formula

$$\large{ QJ = \frac{I}{A} }$$

Where:

$$\large{ J }$$ = current density

$$\large{ A }$$ = cross section area of the conductor

$$\large{ I }$$ = current through the conductor