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Two long wires carrying currents I 1 and I2 in the directions shown, with I 2 = 4I1, cross at right angles in the xy plane. Consider the points A = (2d, d) and B = (2d, −d), where d is a positive number. Find the ratio of the magnitudes of the magnetic fields at these two points, i.e., what is |BB/BA|?
E) None of these
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Based on our data, we think this problem is relevant for Professor Buehrle's class at UMD.