What is the unit for measuring electric potential difference?

The unit for measuring electric potential difference is the Volt. Electric potential difference, often referred to as voltage, represents the amount of electrical energy per unit charge. It is the force that pushes electrical charges through a circuit, allowing them to do work. One volt is defined as one joule of energy per coulomb of charge. This concept is fundamental in electrical systems, as it determines how much energy is available to move charges across a circuit.

The other units mentioned are used for different electrical concepts. Ohm is the unit of resistance, which measures how much a material opposes the flow of electric current. Watt is the unit of power, representing the rate at which electrical energy is transferred or converted; it can be derived from voltage and current. Joule is a unit of energy, measuring how much work is done when an electric current moves through a potential difference. Each of these units plays a critical role in understanding electricity, but when specifically referring to the measurement of electric potential difference, volt is the appropriate choice.