What is an electrical circuit?

An electrical circuit is defined as a closed loop that allows current to flow continuously. This means that the circuit must form a complete path starting from a power source, such as a battery or a generator, through a load, like a light bulb or motor, and back to the power source. When the circuit is closed, electrons can move freely along the path, enabling electrical devices to operate.

In this context, a broken path for current flow, as described in the first choice, would imply an incomplete circuit that cannot facilitate the movement of electricity. Similarly, while devices that regulate voltage and methods of measuring electrical power are important concepts in electrical engineering, they do not define what an electrical circuit is. Rather, they pertain to the functionality and analysis of circuits. Thus, the characteristic of a continuous loop for current flow makes the definition of an electrical circuit clear and accurate.