I understand basic electricity in that electrons are flowing to energize whatever is on the line, say a light bulb, but in order for it to work you need to complete the circuit, why? What is traveling from the light bulb back to the source over the neutral wire?
In: Engineering
The electrons flow “through” the object being powered. In the case of the lightbulb, resistance to the flow of electrons through the light filament makes the filament heat up and shine as electrons move through it.
Imagine a stream that powers a waterwheel. The water pushes the wheel and then moves along on its way, while the wheel turns and performs some kind of work.
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