Potential difference is the difference in the amount of energy that charge carriers have between two points in a circuit. It is also known as voltage and is measured in volts (V) . The potential difference between any two points in an electric field is defined as the amount of work done in moving a unit positive charge without acceleration from one point to the other. The SI unit of potential difference is volts.

Potential difference is required to create electricity and the flow of current, which is maintained by a battery or a cell. The potential difference (which is the same as voltage) is equal to the amount of current multiplied by the resistance. A potential difference of one Volt is equal to one Joule of energy being used by one Coulomb of charge when it flows between two points in a circuit.

In summary, potential difference is the difference in energy between two points in an electric field, and it is measured in volts. It is required to create electricity and the flow of current in a circuit.