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Homework Help: Surface currents

  1. Feb 29, 2012 #1
    1. The problem statement, all variables and given/known data
    If a uniform current with current density s flows around a tube of radius a-- so it is a surface current, how might I find the magnetic field at some arbitrary position vector r?*

    2. Relevant equations


    3. The attempt at a solution

    I am guessing Biot-Savart? Or is there a simpler way since it has nice symmetry?
  2. jcsd
  3. Feb 29, 2012 #2
    Your geometry hasn't been described all that well, but why not ampere?

    [tex]\int \mathbf{B} \cdot d\mathbf{l}=\int \mathbf{J} \cdot d\mathbf{a}[/tex]
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