Ch 27: Sources of Magnetic FieldWorksheetSee all chapters
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Ch 27: Sources of Magnetic Field
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Solution: 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 numb

Problem

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|?

A) 9/7

B) 1

C) 5/3

D) 4

E) None of these