Electromagnetic Induction
Definition #
From Wikipedia:
Electromagnetic induction is the production of voltage across a conductor situated in a changing magnetic field or a conductor moving through a stationary magnetic field.
In other words, magic.
One toroid to rule them all. Or not.
(Photo: Wikimedia)
Commentary #
Induction is the principle behind generating electricity, most electrical motors, and some "smart" traffic lights. It's also how that little bit of foil gets attached to pill bottles and other containers.
See Also #
- Concepts in Science: Electromagnetic Induction at YouTube for an 80's video that's long, but informative.