Electromagnetism – conceptually what is the relationship between electricity and magnetism (and by extension voltage etc)
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Think of an electrical conductor (such as a wire) like the drain in your tub. Once one drop flows down the drain, the rest of the drops follow gravity and start to go down the drain.
Electricity and magnetism work in a similar way. Once electrons are moving through a conductor, they create a pulling force on other electrically conductive materials near it depending on how many elections are moving (aka current). This is how your ceiling fan works – current flows through a series of coils fixed to the housing, and that current pulls (via magnetism) a set of conducive plates affixed to the rotating blades.
The relationship between magnetism and electricity is basically the same thing but in reverse. This is how an electrical generator works – an engine causes the rotation of a set of conducive plates in very close proximity to a set of fixed coils. The rotation of the plates excite the elections in the coils to move them (aka generate current).
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