What is current in an electrical context?

In an electrical context, current refers to the flow of electric charge, particularly the movement of electrons through a conductor. This flow is usually measured in amperes (A) and signifies the rate at which charge is moving. When a voltage is applied across a conductor, it creates an electric field that causes electrons to drift, resulting in a flow of current. This concept is fundamental to understanding how electrical circuits operate, as current is the crucial component that enables devices and systems to function.

The other options describe related but distinct concepts. Electrical resistance is a measure of how much a material opposes the flow of current, while potential difference (voltage) is the driving force that pushes the current through the circuit. A voltage spike refers to a sudden increase in voltage but does not directly define what current is. Understanding that current is specifically about the movement of electrons helps distinguish it from these other important electrical characteristics.