P = EI. But current is a given amount of electrons passing through a given point for a time duration, right? If current is the same with 10V behind it, or 100V behind it, the same amount of electrons are passing through the point for the time duration... so why is voltage considered at all? I know we must have bigger resistors and whatnot for higher power, but why, since the same amount of electrons are passing when the current stays the same? I don't understand why voltage matters aside from pushing the electrons out of the power source in the first place...
Thanks
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