AC motors generate "magnetic ﬂux" and "induced current" inside the motor by the actions of the stator and the rotor, and obtain rotational force. The operation principle of AC motors can be explained by using Arago's disk.
Arago’s disk is the phenomenon when a magnet is moved along the surface of a metal disk, the disk rotates to follow the magnet. First, prepare a round copper plate that can rotate freely and a magnet. Place them so that the copper plate is in between the magnetic poles but the magnet does not touch the copper plate. What is Next?