What is defined as the flow of electrons in a circuit?

The flow of electrons in a circuit is defined as current. Current represents the movement of electric charge, specifically the flow of electrons, through a conductor, such as a wire. It is measured in amperes (A) and indicates how much charge is flowing past a given point in the circuit per unit time.

Understanding current is fundamental in electrical systems because it plays a crucial role in the operation of circuits and electrical devices. When designing or troubleshooting electrical systems, recognizing how current flows helps in ensuring safe and effective operation.

Voltage, on the other hand, refers to the electrical potential difference between two points in a circuit that drives the flow of current. Resistance is the opposition to current flow within a circuit and is measured in ohms. Power, generally expressed in watts, is the rate at which electrical energy is converted to another form of energy (such as heat or light) and is calculated as the product of voltage and current. Each of these concepts is related, but the specific definition of the flow of electrons distinctly supports the notion of current.