What is the primary unit of measurement for voltage?

The primary unit of measurement for voltage is the volt. Voltage, often referred to as electric potential difference, quantifies the potential energy per unit charge that drives electric current through a circuit. It indicates how much work is needed to move a charge between two points in an electric field. The volt is defined as one joule per coulomb, establishing a direct relationship between energy and electric charge.

Understanding voltage is crucial in the context of electrical circuits, as it fundamentally determines the behavior of circuit components, influences current flow, and signifies how much electrical energy can be delivered. In essence, without voltage, there would be no current, and thus no functioning electrical system.