Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Magnets and Electromagnets (Exptal Set-Up)

  1. Dec 13, 2005 #1
    Hi all,
    I need to create a very large magnetic field say 1Tesla (10000 Gauss). But I can not afford to build large electromagnets like the MRI machine. However, I have two permanent magnets that will create a static field of 5000 Gauss. My question is: can I superimpose magnetic fields created by the electromagnets onto the fields created by the permanent magnets? If so, how? There are obvious reasons why I need a changing magnetic field to maintain levitation of a smaller magnet.

    Thanks for your help,
  2. jcsd
  3. Dec 13, 2005 #2


    User Avatar

    Staff: Mentor

    You should be able to superimpose the DC and AC magnetic fields pretty well. I think the only liability is that the AC magnetic field will tend to demagnetize the adjacent permanent magnet a bit over time.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook