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
An electrical load is powered by moving electricity (current flow). Think of it as something that is pressurized (with voltage). If you had a pump that was powered by water it would need water constantly flowing to perform the mechanical energy needed to perform work. A light bulb is burning a filament, an LED is a diode which lets off light when current flows through it. An electric motor uses electromagnets that turn in order to follow changing polarity which only changes because current is flowing through it. Work can’t be performed if there is no movement/ kinetic energy.
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