there’s these things called electrons that are moved when you move a magnet relative to a conductor material, such as copper, these electrons have more power than steam. Switches are signal devices, like valves in a steam engine. We used to use them, for instance, to make a signal pass or not pass. These switches have, over the years, been manufactured to an astounding billions per square inch, they are all called transistors and have no moving parts. Four equations will be sufficient to describe the situation.