What unit is used to measure potential difference in an electrical circuit?

The unit used to measure potential difference in an electrical circuit is volts. Potential difference, also known as voltage, represents the work done per unit charge to move a charge between two points in an electrical field. It indicates how much energy is available to push electric charges through a circuit.

In a practical context, when a battery or power supply provides a voltage, it creates the potential that drives electric current through resistive components, allowing devices to operate. This unit is fundamental in understanding how circuits function, as voltage influences current flow according to Ohm's Law, which states that the current through a conductor between two points is directly proportional to the voltage across the two points.

The other units mentioned serve different purposes: amperes measure current, ohms measure resistance, and watts measure power. Understanding these distinctions is essential for comprehending basic electrical concepts and analyzing electrical circuits effectively.