electricity that lights up a bulb looks very different than lightning strikes but they're actually more similar than one might think because they both have electric current so let's understand what ...

This persnickety number determines the strength of magnetic fields. It figures in everything from motors and generators to audio speakers. Oh, and without it we’d live in eternal darkness.

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. To the uninitiated, electricity might seem like a sort of hidden ...