What is measured by the number of coulombs per second that move past a fixed point in a circuit?

The measure of the number of coulombs per second that pass a fixed point in a circuit directly corresponds to electric current. Current is defined in terms of the flow of electric charge, specifically how much charge (in coulombs) moves through a conductor in a given time (in seconds). Essentially, one coulomb of charge passing a point in one second constitutes a current of one ampere. This fundamental relationship is critical for understanding how electrical systems operate, as current is a key parameter influencing the behavior of electronic components, circuit design, and overall system functionality. In contrast, voltage measures electrical potential difference, resistance quantifies opposition to current flow, and power is the rate at which energy is transferred or converted, which are distinct concepts from current itself.