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Calculate Magnetic Field through Angular Velocity

  1. Apr 5, 2014 #1
    1. The problem statement, all variables and given/known data

    A thin plastic rod of length L with total charge +q uniformly distributed along only the outer half-length is shown in Fig. 1. The rod is rotated at a constant angular speed w rad/sec about, and perpendicular to, the z-axis. Find the magnetic field B at the pivot, perpendicular to the plane of rotation in terms of L, q and w. (Hint: View the situation as a series of concentric current loops, each with thickness dl.)

    RXub3bb.jpg

    2. Relevant equations
    No clue which equations will help with angular velocity.


    3. The attempt at a solution
    I don't know how to go about this problem

    Thanks for any help.
     
  2. jcsd
  3. Apr 5, 2014 #2
    Do you know a formula that uses velocity?
     
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