Electric Field Due to Dipole on Axial Line

Electric Field Due to Dipole on Axial Line

### Formula

$$E_{axial}=\frac{1}{4\pi\epsilon_0}\frac{2p}{r^3}$$

### Terminologies

- Eaxial → Electric field on axis of dipole.

- p → Dipole moment.

- r → Distance from centre of dipole.

### Conditions / Special Cases

For far point:

$$r\gg a$$

Field decreases as:

$$E\propto\frac{1}{r^3}$$

### Usage

- Used in dipole field calculations