Repost from a few years ago, because I have to explain this effect to Matt.
#lenzlaw #physics
Originally shared by Corina Marinescu
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.
Read more:
http://regentsprep.org/Regents/physics/phys08/clenslaw/
#lenzlaw #physics #experiments
Antenna Wilde -- this is mostly useful as a braking system, rather than a frictionless levitation system, unfortunately. Maglevs sure would benefit from superconductors, though.
ReplyDeleteAntenna Wilde Gasundheit!
ReplyDeleteThat entire first sentence went over my head... But it's spurred me to do some research so I can understand a little better the interplay between electromagnetic fields!
Antenna Wilde -- time to start finding some extremely low bandgap diodes, I think.
ReplyDeleteOne of these days I really have to do this trick. I just need the chunk of pipe.
ReplyDelete