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Repulsive force btwn electromagnet and permenant magnet (NdFeB)

  1. Mar 22, 2010 #1
    hi all, i am currently working on a magnet generator/motor and i have some qns on electromagnetism.

    i am currently trying to find out how much does my electromagnet (ferrite core) requires in order to repel a permenant magnet, in this case, a cylindrical NdFeB magnet.

    i have been trying to find out from the web and libraries regarding the force between the magnets and the closest i have come to is


    there r so many other equations but none of them involves an electromagnet and a permanent magnet. so i would like to ask for advice and correction. thanks!

    p.s: posted in electrical engineering earlier before realizing theres a classical physics section. my bad!
  2. jcsd
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