What is meant by the term 'electrical potential difference'?

The term 'electrical potential difference' refers specifically to the difference in voltage between two points in an electrical circuit. It is a measure of the work required to move a unit charge from one point to another. This potential difference is what drives the electric current through a conductor, as it creates the necessary push for electrons to flow. Voltage is fundamental in electrical theory and is measured in volts (V). Understanding potential difference is crucial in analyzing how electricity behaves in circuits, as it directly influences current and power. In contrast to other options, such as charge, current flow, or total resistance, the concept of electrical potential difference specifically relates to the voltage levels that establish the conditions for current to exist in the first place.