The formula to calculate the Current Density (j) is:
\[ j = p \times v \]
Where:
Let's say the charge density (\( p \)) is 5 C/m³ and the velocity of the charges (\( v \)) is 2 m/s. Using the formula:
\[ j = 5 \times 2 \]
We get:
\[ j = 10 \text{ A/m²} \]
So, the Current Density (\( j \)) is 10 A/m².
Current density is defined as the total current per unit of volume or area. It is a measure of the electric current (flow of electric charge) per unit area of cross-section.