What unit is used to measure electric current?

The unit used to measure electric current is the Ampere, often abbreviated as "A." The Ampere quantifies the flow of electric charge in a circuit. One Ampere denotes one coulomb of electrical charge moving past a specific point in a circuit per second. This definition is foundational in understanding how electrical systems operate, as current (measured in Amperes) is crucial for determining the behavior and functionality of circuits.

The other units mentioned relate to different aspects of electrical measurement: Ohms measure resistance in a circuit, Volts quantify electrical potential or voltage, and Watts measure electrical power, which is the rate at which electrical energy is consumed or transferred. Each of these units plays a significant role in the broader context of electrical theory but does not serve to directly quantify electric current like the Ampere does.