Electric Flux

Electric Flux

Electric flux represents the number of electric field lines passing through a surface.

### Formula

$$\Phi_E=\vec E\cdot\vec A$$

### Expanded Form

$$\Phi_E=EA\cos\theta$$

### Terminologies

- ΦE → Electric flux.

- E → Electric field.

- A → Area vector.

- θ → Angle between E and area vector.

### SI Unit

$$Nm^2C^{-1}$$

### Usage

- Used in Gauss law problems.