Neodymium Ring

Neodymium Magnet Huge NdFeB Ring 3OD x 175ID x 1
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US $129.99

30 Magnets Rare Earth Neodymium Ring 1 4ODx1 8IDx1 4
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US $19.99

40PC Neodymium Magnets 1 4ODx1 16IDx1 8 NdFeB Ring
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US $16.99

50PC Neodymium Magnets 3 16ODx1 16IDx1 16 NdFeB Ring
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US $15.99

30PC Neodymium Magnets 3 16ODx1 16IDx3 16 NdFeB Ring
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US $14.99

Neodymium Ring
Neodymium rare earth magnets?

If I have a ring magnet with a hole in the center (donut), if I put a copper pipe through the center, hold the magnet against the copper? ... or to repel uniformly in all directions so it doesn't touch the copper at all? ... I'm trying to demonstrate the levitation and I, as dragging the least amount possible. I want to put a magnet on the bottom then put a magnet on the top, so that repel loom on the magnet at the bottom. Then stick a wooden stick through the center so that the top magnet does not fly out. However, the top magnet is rubbed against the wooden dowel when cranking. But if you drop a ball magnet inside a copper tube will slow down. I wondered if I had the same effect on the outside. What If you use steel pipe?

One of my favorite events involves dropping a ball Neodymium Iron Boron (NIB) magnet below thick copper tube wall. Before the demonstration, the magnet is close to the pipe, so that students can see that copper is not magnetic. When the magnet is dropped, however, it needs a total of 8 seconds for the fall. The magnet seems to float in the air traveling through the tube 3 feet. His ring magnet will not stick to the sides of the pipe copper, but they will fall outside the line more slowly due to Lenz's law. I think copper is a good idea because it has two events in one: the law of Lenz, and magnetic repulsion. Whatever you decide, find a well-polished material to minimize friction forces.

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