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Help with Magnetic Field Questions

  1. Apr 10, 2008 #1
    1. The problem statement, all variables and given/known data
    Two long, parallel wires are attracted to each other by a force per unit length of 335 µN/m when are separated by a vertical distance of 0.460 m. The current in the upper wire is 20.0 A to the right. Determine the location of the line in the plane of the two wires along which the total magnetic field is zero.
    m

    unknown data is i2

    2. Relevant equations

    F/l = i1 * i2 * u) / (2pi * d)

    3. The attempt at a solution
    The farthest I can get with this problem is solving for i2. I have no idea where to go after that. Don't know where to go with finding the location where the magnetic field is zero.
    i2 = f/l / (i1 * u) * 2pi * d
     
  2. jcsd
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