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Force on wire due to magnetic field

  1. Apr 30, 2009 #1
    1. The problem statement, all variables and given/known data

    A straight segment of a current-carrying wire has a current element IL where I = 2.70 A and L = 2.60 cm i + 4.40 cm j. The segment is in a region with a uniform magnetic field given by 1.36 T i. Find the force on the segment of wire. (Give the x, y, and z components.)

    2. Relevant equations

    [tex]\theta = tan^{-1}(y/x)[/tex]

    [tex]F = ILBsin\theta[/tex]

    3. The attempt at a solution

    Well I am pretty sure there will be no x or y component because the force will be perpendicular in the z direction.

    To find the z component I found the angle between the wire and the mag field using:

    [tex]tan^{-1}(4.4/2.6) = 59.421[/tex]

    After that I thought you are just supposed to plug everything in:

    [tex]2.7A * .05111m * 1.36 * sin(59.421) = .1615N[/tex]

    But it's wrong!! I'm not sure what I am doing wrong, the book I am using isn't very good ad explaining. I'm sure it's something simple that I am just overlooking.

    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Apr 30, 2009 #2
    CANCEL that. I just had the wrong sign. I understand why it should be negative now. This thread can be deleted.
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