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Torque on a small loop by a large loop?

  1. Apr 12, 2009 #1
    A small loop of wire of radius 2.0 cm is placed at the center of a wire loop with radius 24 cm. The planes of the loops are perpendicular to each other, and a 6.0 -A current flows in each. Estimate the magnitude of the torque the large loop exerts on the smaller one.

    I know the rules but I honestly have no Idea on where to start.
  2. jcsd
  3. Apr 12, 2009 #2

    Doc Al

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    Staff: Mentor

    Start by figuring out the magnetic field at the center of the large loop.
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