/sci/ - Science & Math

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Electrons originate from the earth: "In the case of a generator which does not have a return line, electrons are "pumped" from the ground to elevated potentials by the generator. The conductors then transport electrons and energy to a load, where the electrons then return to ground, returning the energy gained at the generator. If the generator is not connected to a "earth" ground then the return path must provided. In this case electrons are simply "pushed" through the circuit by the generator. Isolated circuits must have a means of moving electrons or a source of electrons. The source can be a chemical reaction as in a battery or a atomic change in state as in a Photovoltaic cell. Do not get the idea that only electrons can be current carriers, in ionic solutions the ions, both positive and negative can be current carriers."

Reference https://www.physicsforums.com/threads/in-am-electrical-generator-where-do-the-electrons-come-from.12929/