Youtube maglev toy train demonstration

[Naty1]

Interesting four minute video with a magnetic levitation superconductor train

http://www.youtube.com/watch?v=5el1A5B-h3Q&feature=player_embedded

Perhaps a good demonstration for teachers

 

[cragar]

Is the reason that the superconductor memorizes its position above the magnets because when its cooled down it generates surface currents to oppose the field so that it remains zero inside the superconductor. And when you pull it out of the field and set it on the track, the surface currents continue to flow because there is no resistance.