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 electrical charge, and it is quantified in amperes (A). When electrons move through a conductor, they establish a flow that allows electrical energy to be transferred from one point to another, enabling electrical devices to operate.

In the context of electrical circuits, current is a critical concept because it directly influences how much power can be delivered to devices connected to the circuit. Understanding current is essential for calculating how components interact within the circuit, including how they affect overall performance and efficiency.

Voltage, on the other hand, refers to the potential difference that drives current through a circuit. Resistance pertains to the opposition that a material offers to the flow of current, which can affect how much current actually flows when a voltage is applied. Power, meanwhile, is the rate at which energy is consumed or converted, and it depends on both the current and voltage in the circuit. Thus, while each term plays a significant role in electrical systems, current specifically denotes the flow of electrons, making it the correct answer.