What unit is used to measure electric current?

The unit used to measure electric current is the ampere, often abbreviated as "amp." The ampere quantifies the flow of electric charge in a circuit. Specifically, one ampere equals one coulomb of charge passing through a point in a circuit per second. This measurement is fundamental in understanding how electrical systems operate, as it helps to define the amount of current flowing through wires and components, which is essential for circuit design and troubleshooting.

The other units listed—volts, ohms, and watts—measure different electrical properties. Volts indicate the electric potential or electromotive force that drives current through a circuit, while ohms measure resistance against the flow of current. Watts represent power, calculating the rate at which electrical energy is consumed or converted. Understanding these different units is crucial for anyone studying automotive electrical systems, but the ampere specifically addresses the measurement of current itself.