Electric Potential at a point in an electric field is the work done per unit charge by an external agent in bringing a positive test charge from infinity to that particular point without acceleration.

- E-field lines always point from region of high potential(+) to regions of low potential (-)
- Unit: Volts (V)

**Various equations for electric potential:**

$$V = \frac{W}{q}$$

, where

- V is electric potential,
- W is work/energy,
- q is charge

$$V = \frac{Q}{4 \pi \epsilon_{o} r}$$

, where

- V is electric potential,
- Q is charge,
- r is distance from the charge

$V = Er$

, where

- V is electric potential,
- E is electric field,
- r is distance from the charge

Electric potential of a positive charge decreases with increasing r.

Electric potential of a negative charge increases with increasing r.