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Magnetic field from point source

  1. Jul 3, 2009 #1
    1. The problem statement, all variables and given/known data

    A circular loop of wire of radius R carries current I. It is placed in a magnetic field whose straight lines seem to diverge from a point a distance d below the ring on it's axis. It makes an angle theta with the loop at all points where (tan theta= R/d). What is the force on the loop???



    2. Relevant equations

    F= IL x B




    3. The attempt at a solution

    I cant seem to cancel out the x and y components as I take the integral.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Jul 3, 2009 #2

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    Hi Maxwellkid! :smile:
    Two practical answers:

    a) why bother? you know it'll be in the z direction, so just do the z component! :wink:

    b) but if you are bothered, show us what you did, and where it goes wrong :smile:
     
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