https://www.youtube.com/watch?v=bHIhgxav9LY

so, uh .. why haven't we got Telsa power coils yet, powered by the earths electromagnetic field?

>>5053

The earth's electromagnetic field is static and extremely weak. You could generate a tiny current by spinning a coil in that field, but you'd generate a far larger current by spinning a coil next to a big magnet. Spinning a coil next to a magnet (or spinning a magnet next to a coil) is how we make nearly all of our electricity; the problem is where you get the energy to do all that spinning.

This channel alone does a great deal in explaining why, and what interaction everything in a system has with everything else.

https://www.youtube.com/watch?v=QPAxzr6ihu8