What does the term "neutrals" refer to in electrical systems?

The term "neutrals" in electrical systems specifically refers to the return path of an electrical circuit that carries current back to the source. In an AC (alternating current) system, the neutral wire serves as the conductor that completes the circuit by returning the current to the power source after it has circulated through the load (e.g., a light bulb or appliance). This is essential for ensuring that the current can continuously flow, allowing devices to function correctly.

The neutral wire is typically bonded to ground at the service panel, which enhances safety by preventing the build-up of voltage on the neutral and providing a path for fault currents. However, its primary role is to provide a return path for current, making option B the correct answer.

In contrast, the positive terminal of a circuit typically refers to the point of higher electrical potential, which is distinct from the concept of neutrals. Ground connections are meant for safety and fault protection, while a secondary power source refers to an alternative source of electrical power, neither of which accurately describe the function of neutrals.