What is the function of a neutral wire in an electrical circuit?

The function of a neutral wire in an electrical circuit is to complete the circuit by providing a return path for current. In an electrical system, current flows from the power source through the hot wire (which carries the current to the load) and returns through the neutral wire, thereby closing the circuit. This return pathway is essential for the circuit to function correctly and safely, as it allows for the continuation of electrical flow after it has passed through the devices or appliances being powered.

The neutral wire serves as a reference point for voltage levels and is typically grounded at the main electrical panel to ensure safety and stability in the system. Its role in completing the circuit is crucial for ensuring that electrical devices operate correctly and efficiently.

In contrast, options referring to supplying additional voltage, grounding the system, or controlling the flow of electricity do not accurately describe the primary role of a neutral wire. The functionality of the neutral wire is distinctly centered on providing a safe and effective return path for current, ensuring that electrical systems work as intended.