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Homework Help: Force per unit length on the wire in the bottom left hand corner.

  1. Oct 14, 2009 #1
    1. The problem statement, all variables and given/known data[/b]
    Suppose in the figure that the four identical currents i = 13 A, into or out of the page as shown, form a square of side 64 cm. What is the force per unit length (magnitude and direction) on the wire in the bottom left hand corner? (N/m) Take the positive y direction as up and the positive x direction as to the right.
    What is the magnitude of the force per unit length?

    (diagram is in following post)

    What is the x component of the force per unit length?

    What is the y component of the force per unit length?

    2. Relevant equations

    F= muo*i1*i2/2*pi*d

    3. The attempt at a solution
    F= 1.26E-6 * 7A * 7A/ 2*pi* sqrt(2*.64m) = 1.095E-4

    i do not know if i am doing this right at all...but this answer is wrong for the the first part..
    Last edited: Oct 14, 2009
  2. jcsd
  3. Oct 14, 2009 #2
    here is the pic...oops

    Attached Files:

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