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Homework Help: Determine the magnitude of the net force on the loop.

  1. Aug 8, 2011 #1
    1. The problem statement, all variables and given/known data
    A rectangular loop wire is placed next to a straight wire, as shown in the figure. There is a current of 3.5 A in both wire.

    Figure: http://www.flickr.com/photos/65980314@N06/6020832477/

    2. Relevant equations
    F = ((mu(0)*I1*I2) / (2*pi*r)) * L
    force in terms of current

    3. The attempt at a solution

    I broke it down to two forces F1 and F2 and then added them but I'm not getting the correct answer.
  2. jcsd
  3. Aug 8, 2011 #2

    Doc Al

    User Avatar

    Staff: Mentor

    In what direction does each force act?
  4. Aug 8, 2011 #3
    oh okay, i guess im still having trouble with determining the direction of the different fields. i was able to figure it out.

    answer: F = 5.1x10^-6 N
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