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Homework Help: Scalar magnetic potential

  1. Oct 1, 2013 #1
    Hello,
    I'm really stuck, I don't know how to start !
    1. The problem statement, all variables and given/known data
    In the regions where Jl=0, we have x H=0, so we can introduce a magnetic scalar potential Vm such as H=-Vm. A long cylinder of radius R of linear magnetic material of permeability μr. The cylinder axis is in z direction, and there's a H field that is Ho*x^ far from the cylinder.
    For symetrical reasons:
    Vm=(As+B/s) cos(phi) Vm'=C*s*cos(phi)

    Vm the potential outside the cylinder and Vm' inside.
    Express A, B and C in terms of the other problem constants.

    2. Relevant equations
    ∇⋅(μoH+μoM)=0 * * so * ∇⋅H=−∇⋅M
    m=∇²Vm


    3. The attempt at a solution

    If someone can explain me the steps to follow it would be great
    I don't even understand what is the angle phi
    Thanks
     
    Last edited: Oct 1, 2013
  2. jcsd
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