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

About magnetic fields

  1. Sep 20, 2007 #1
    I have a cluster of magnetic sources around a volume and I need to know the real magnetic field in a point (namely x_0) inside the volume by measurements in another point x' in the surface of the volume.
    I'm getting mad
     
  2. jcsd
  3. Sep 20, 2007 #2
    hehe,

    I'm getting mad about computing the magnetic field of only 1 permanent magnet.
    I guess that basically, if you know the field of 1, you will know the total field (summing).
    Here is a wikipedia link, in which an approximation is made, to consider 1 magnet as a solenoid. http://fr.wikipedia.org/wiki/Réluctance
    Unfortunately i did not find any equivalent in English.

    It says :
    A permanent magnet with remnant field B, lenght l, section s, [tex]\mu[/tex] its permability, it is equivalenent to a soleoind :
    - of reluctance R = l/([tex]\mu[/tex]s)
    - with : N.I = (l.B)/[tex]\mu[/tex], N the equivalent number of current loops, I the equivalent current
    - lenght l and section s.

    Imagine how is it frustrating when you need to analytically compute the force between two permanent magnets (actually, there is no viable direct computations, only based on finite element decompositions).

    -----------------------------------------------------
    Correct me if i'm wrong.
    http://ghazi.bousselmi.googlepages.c...3%A9sentation2
     
    Last edited: Sep 20, 2007
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?