A new motor effect experiment

 

When I say "new experiment" I mean it's the first time I've used it with my classes but it came from the Nuffield O Level course and I've known about it for years. I had foil strips folded double and then bent up to the loose between the poles of a pair of magnadur magnets. When connected to 2V the foil was either pushed up or pushed down depending on the direction of the current.

Later I noticed that if the force was pushing the foil up and I pushed down with my finger, I could feel the force. I could let it spring up and down.