Current Density (j = I/A = nevd)
jee-mainjee-advancedneet-ug
j = I/A = nevd
What each symbol means
| Symbol | What it stands for |
|---|---|
| A | Area (m²) |
| I | Current (A) |
| e | charge (C) |
| j | Current density (A/m²) |
| n | electron density (m⁻³) |
| v_d | drift speed (m/s) |
When to use this
Uniform current across cross-section; scalar magnitude.