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Homework Help: Magnetic field around spinning sphere

  1. Aug 7, 2009 #1
    1. The problem statement, all variables and given/known data

    So there's a sphere, and it has a positive charge on it. The sphere is spinning, and the angular velocity vector is pointing up through the top. What does the magnetic field look like inside & outside the sphere?


    2. Relevant equations


    3. The attempt at a solution

    This is what I think it looks like outside of the sphere, but I'm not sure what it would look like inside...


    Attached Files:

    • qu1.jpg
      File size:
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  2. jcsd
  3. Aug 7, 2009 #2


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    Staff: Mentor

    Which equation do you use to figure out the magnetic B-field due to moving charges (current)? That is certainly a Relevant Equation for this problem.
  4. Aug 7, 2009 #3
    F=qvBsin(theta) ?

    I dont see how this is relevant though, since I am not asked to calculate anything, simply draw in the magnetic field lines
  5. Aug 11, 2009 #4
    can anyone tell me if im thinking about this right? i dont need any equations I just need to be able to draw the magnetic field
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