What is the term used to describe the potential difference in electron charges?

The correct answer, voltage, refers to the potential difference in electron charges between two points in a circuit. This potential difference is crucial because it is what drives electric current through the conductors. Voltage is measured in volts and can be thought of as the pressure that pushes electrons through a circuit. It determines how much energy is available to move the charges along the conductive path, thus facilitating the flow of electricity.

In contrast, current refers to the flow of electric charge and is influenced by the voltage; resistance measures the opposition to current flow, and power represents the rate at which electrical energy is consumed or converted. Voltage is the fundamental difference in charge potential that establishes the conditions for current flow, making it the essential concept in understanding electrical circuits.