What unit is used to measure electric current?

The unit used to measure electric current is the Ampere. The Ampere, often abbreviated as "Amp," is defined as one coulomb of charge passing through a conductor in one second. This unit is a fundamental measure in electrical science, indicating the flow rate of electric charge.

Understanding electric current is crucial because it relates directly to how electrical devices function. The other choices represent different electrical concepts: Voltage (Volt) measures the potential difference that drives electric current, resistance (Ohm) quantifies how much a material opposes the flow of current, and power (Watt) measures the rate at which energy is used or produced in an electrical circuit. Each of these units plays a significant role in electricity but specifically, the Ampere is the standard unit for measuring current itself.