The key interaction is between a permanent ... through the coil. The end effect is that it “senses” the magnet passing by and gives it a little push to keep things moving.

Levitation is managed by a permanent magnet on the light assembly and an electromagnetic coil hidden on the other side of the top panel for the enclosure. That coil uses 300 meters of 20 AWG wire.

A coil with an iron core is called an electromagnet ... A steel core makes a more permanent magnet. It does not lose its magnetism quickly when the current is switched off. Electromagnets with ...

Cartridges come in two types: moving magnet and moving coil. Moving magnet (MM) cartridges have a cantilever which transfers mechanical vibrations picked up from the record groove straight into ...