Lenz’s law & why do magnets fall more slowly through a copper tube?
When you move a magnet past a metal plate or through a copper tube you generate a current.
The current it’s self generates magnetic fields which oppose the magnetic field generated by the magnet impeding it’s movement
The key is in explaining that the law runs both ways; current generates magnetic fields, and magnetic fields generate current.
Story and gif via The Crafty Chemist