The high resistance piece of wire in incandescent light bulbs glows as a result of electrons incoming through a low resistance material being squeezed through (bombard electrons that don’t want to be moved in) the high resistance material with a certain pressure (voltage). We are using the high resistance material to usurp (convert into heat and then into light) the kinetic energy of the electrons in the low resistance material (commonly copper wire).
We do the same thing with electrical heating elements and microphones.
Are we also doing this in electrical appliances from which we don’t expect a certain “end product” (heat, light, sound)? For instance, computers. When we were still using actual physical relays to build logic gates, I can imaging electron flow being converted into the energy (eletrco magnetism?) required to actuate/move the switch inside the relay. But what about today’s transistors? The processing units inside CPUs and GPUs heat up, but that’s a side effect of something I don’t understand. We are not trying to reap that heat. We are after manipulating groups transistors into expressing boolean logic by either giving them a voltage or not.
I know very little of electricity, so please do correct any incorrect assumptions! I’m very eager to learn! 😊💡
hm thanks for pointing that out. i will have to thonk abt that for longer though.
It’s admittedly confusing because electromagnetism is a unified field theory, and like I said, a bunch of pop-science YouTubers really make it worse. Current is defined as the rate of charge flow through a cross sectional surface of a conductor, which is caused by the electromotive force, which is simply a charge potential. The fields created by moving charge can be used to do work proportional to the current which creates them, but it is fundamentally the current doing the work.
The misconception is that it’s not like one electron zooming down a wire, dumping energy into a sink, but the bulk change in how electrons, and therefore charge is distributed which moves energy around. Think about pushing something with a stick - the atoms near your hand don’t actually need to move down the stick to transmit force.