What is the unit of electrical current?

The unit of electrical current is the Ampere, often abbreviated as "A." This fundamental unit measures the flow of electric charge in a circuit. Specifically, one ampere is defined as the flow of one coulomb of charge per second. Understanding current is crucial in electrical engineering and electronics, as it is integral to how electrical devices operate, influence circuit designs, and determine the load on electrical systems.

The other options represent different electrical parameters: voltage is measured in volts, which represents the potential difference that pushes current through a circuit; resistance is measured in ohms, which quantifies how much a component opposes the flow of current; and power is measured in watts, which reflects the rate at which electrical energy is consumed or converted. Each of these units plays a distinct role in electricity and its applications, but when specifically discussing current, the ampere is the correct and relevant unit.