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For EE.SE purposes, the creation (battery/generator/solar cells), storage, control and transmission of electrons. This can be broken down into sub-topics such as voltage, current, reactance and ohms. These can be broken down into more sub-topics such as electromagnets, coronas, heat, ESR, EMF. This excerpt just touches on all the endless fields electrons are involved in, including physics.

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Converting Magnetism to electricity

I've been seeing a lot of videos online of people using neodymium magnets to make a motor spin to generate electricity. … If we can generate electricity from magnets why isnt this being used more often? I'm assuming there are limitations. E.g heat or the amount of energy the magnets can generate? …
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