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Homework Help: Forces between 2 parallel wires=>

  1. Apr 26, 2009 #1
    1. The problem statement, all variables and given/known data
    four long straight parallel wires located at the corners of a square of side l=6cm carry equal current I=10A which is perpendicular.Determine the magnitude and direction of B at the center of the square.

    2. Relevant equations
    don't have,so sorry..

    3. The attempt at a solution
    i begin with drawing a free body diagram where the forces are located.Then i resolve them according to y-axis and x-axis.i use B=u(Ia)(Ib)l / 2pie(r) correct me if i'm wrong,but somehow i can't get the ans..could you please kindly rectify and guide me..thanks a lot..=>:smile:
  2. jcsd
  3. Apr 26, 2009 #2


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    Homework Helper

    Are there any symmetries that you think you can exploit?
    Such as what are the directions of the B-field at the center point. Do any of them offset each other?
  4. Apr 27, 2009 #3
    oh,i can figure it out already,thanks for your guidance o:)
  5. Apr 27, 2009 #4
    Could you please post the answer?
    I subscribed to this thread to see the answer :P
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