What completes the circuit from the power source's positive terminal through the structure?

What completes the circuit from the power source's positive terminal through the structure?

• A. The negative lead
• B. A return path through the control panel
• C. The positive lead
• D. The ground strap

Answer: (C)

A circuit is only complete when current has a continuous path back to the power source. From the power source’s positive terminal, current travels through the structure and then needs a return path to the source to close the loop. In this wiring arrangement, the positive lead provides the remaining conductor needed to bring the current back toward the source, completing the circuit. The other return paths (like a path through the control panel or a ground strap) can serve as return routes in different configurations, but the setup described completes the loop via the positive lead.

A circuit is only complete when current has a continuous path back to the power source. From the power source’s positive terminal, current travels through the structure and then needs a return path to the source to close the loop. In this wiring arrangement, the positive lead provides the remaining conductor needed to bring the current back toward the source, completing the circuit.

The other return paths (like a path through the control panel or a ground strap) can serve as return routes in different configurations, but the setup described completes the loop via the positive lead.