A volt is a measure of what?

A volt is a measure of electromotive force (emf), which represents the energy per unit charge produced by an energy source, such as a battery or generator. It quantifies the ability of an electric field to drive current through a circuit. Understanding this concept is crucial because it helps in comprehending how electrical systems operate, particularly when discussing how voltage affects current flow according to Ohm's law.

Voltage, or electromotive force, is essential in circuit design and electrical engineering, as it determines how much energy is available to move electrons through a conductor, thereby enabling electrical devices to function. The relationship established by voltage is foundational for calculations involving power, resistance, and current in electrical circuits.