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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.

More on this later.

See Also #