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Homework Help: Magnetic Field and Parallel Wires

  1. Oct 6, 2009 #1
    I have four parallel wires carrying equal currents of 2 amps arranged in a square (see picture attachment for clarification) The figure is an end-view of the wires and each side of the square has an equal length of 0.1m. The direction of current is -Z for A, B, and C; and the direction of current is + Z for D.

    How can I determine the magnitude of the magnetic field at point P in the center of the square?

    I have the equation F=I'L x B, but I'm not sure how to solve this. Any pointers would be appreciated. Thanks!
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution

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  2. jcsd
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