What is the standard unit of electrical potential difference?

The standard unit of electrical potential difference is the volt. This unit measures the amount of electric potential energy per unit charge, indicating how much energy is available to drive the flow of electrons in a circuit.

When a potential difference of one volt exists, it means that one joule of energy is used to move one coulomb of electric charge. Understanding this is crucial in electrical engineering and other applications involving electricity, as it helps to quantify and describe how voltage influences the behavior of electrical circuits.

The other options refer to different electrical concepts. The ampere measures the flow rate of electric charge, the ohm quantifies electrical resistance, and the watt indicates the power consumed or produced in a circuit. Each plays a vital role in the study of electricity, but they do not define electrical potential difference like the volt does.