How is current defined in electrical terms?

Current is defined in electrical terms as the flow of electrons. This concept is fundamental in understanding how electricity operates. Current represents the movement of electric charge through a conductor, which is typically a wire. In most contexts, this flow is due to the motion of electrons, which are negatively charged particles.

When a potential difference (voltage) is applied across a conductor, it creates an electric field that encourages the electrons to move, resulting in the flow of current. This flow can be measured in amperes (A), which quantifies the amount of charge passing a point in the circuit per unit time.

Other options present concepts related to electrical systems but do not define current directly. Electrical potential difference describes the energy per unit charge but does not account for the concept of flow, while opposition to current flow is defined by resistance. Voltage times resistance relates to Ohm's Law, which expresses the relationship between voltage, current, and resistance but again does not capture the essence of what current itself is.