Consider the domino effect. What if we could wave a magic wand and knock them down then wave it the other direction and stand them back up. Perhaps a double ended wand wave one end and they fall wave the other and they stand again.
Maxwell's law states an electric field in motion creates a magnetic field. In the mind experiment the wand would be an electric field and the dominoes the magnetic field.
As an electrical potential is placed on a conductor it will create a magnetic "B" field around the conductor. An AC field will produce a B field in one polarity as it goes positive and a B field in the opposite polarity as it goes negative. The fields and motion are at 90 degrees to each other.
So our dominoes would stand - fall - stand in opposite direction.
This is enough for now. More later.......