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Homework Help: Four electric currents

  1. Aug 9, 2010 #1
    1. The problem statement, all variables and given/known data

    Four electric currents, equal in magnitude are arranged at the corners of a square as shown in the figure.

    Two currents go into the page, and two are pointing out of the page. Point a is at the center of the square, and points b and c are in the middle of two of the sides. What is the direction of the magnetic field at points a, b, and c?

    3. The attempt at a solution
    I am really clueless, but I would guess a is zero. b and c point north.
    Last edited by a moderator: Apr 25, 2017
  2. jcsd
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