1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

B Please confirm magnetic levitating rotor

  1. Apr 3, 2016 #1

    what do you think is this video real or is there a trick somekind ?
  2. jcsd
  3. Apr 3, 2016 #2
    The static semi circle magnets look just off centre from the levitating disk shaped ones. If the semi circle ones have, say their north poles facing towards the axis of rotation and the disk magnets are axially polarised and have their north poles facing inwards towards each other, then the semi circle ones would repel both of them in opposite directions due to them being slightly closer together than the disk ones are, this would create an equilibrium position in the axial direction. The semi circle magnets would also repel the disks vertically, this repulsion would be countered by the weight of the axle and disk magnets at some height, these two combined create a point of equilibrium where the axle can spin. Doesn't look like anything weird happening, you can buy toys that do the same thing.
  4. Apr 3, 2016 #3
    the magnets look like taken from old speakers and simply arranged to work with this application
  5. Apr 3, 2016 #4
    No problem with that, they're still magnets. What are you thinking the issue is?
  6. Apr 3, 2016 #5
    no im ok there is no issue just at first I was a bit skeptical because of the video not the fact that magnetic levitation is a real phenomenon.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted