What is the SI unit of electric charge?

The SI unit of electric charge is the Coulomb. This unit quantitatively measures the amount of electric charge that is passed by a steady current of one ampere in one second. Specifically, one Coulomb is equivalent to the charge transported by a current of one ampere in one second.

Understanding this concept is crucial in physics because electric charge plays a foundational role in electromagnetic interactions, electric circuits, and many other areas of study. The other units listed have distinct definitions and applications: for example, the Volt is a unit of electric potential, the Joule is a unit of energy, and the Farad is a unit of capacitance. Each of these units serves a unique purpose in the realm of physics, but when it comes to measuring electric charge directly, the Coulomb is the definitive SI unit.