Current Density

Current Density

### Formula

$$J=\frac{I}{A}$$

### Alternative Form

$$J=nev_d$$

### Terminologies

- J → Current density.

- I → Current.

- A → Cross-sectional area.

- n → Number density.

- e → Electron charge.

- vd → Drift velocity.

### SI Unit

$$Am^{-2}$$

### Usage

- Used to describe current distribution.