Suppose an aluminium disc is suspended where it can freely rotate.
A magnet is placed above (not touching) the aluminium disc and made to spun.
This obvious causes a changing magnetic field.
By Faraday's Law, this will induce current in the disc below that oppose the motion of the magnet by Lenz's Law.
However, why does the disc then still spin in the same direction as the movement of the magnet?
I understand that the disc will induce a secondary magnetic field that slows the rotation of the magnet, but how come the disc still follows the magnet?
Please help! All is appreciated.