Potential difference also known as voltage is the difference in the amount of energy that charge carriers have between two points in a circuit.

The larger the potential difference, the faster the current will flow and the higher the current.

Potential difference is measured in volts (V) and the instrument used in known as a voltmeter.

This concept provides the basis for understanding electric circuits.

**Formula to calculate potential difference.**

The formula used to calculate voltage is known as Ohm’s Law.

**Example:**

A current of 20 amperes travels through a circuit that has a 4 ohms resistor connected in parallel. Determine the potential difference of the circuit.

Therefore, the potential difference of the circuit is 80 V.