Problem C1:
Consider the two infinitely long wires shown above in the figure. The wires are
separated by a distance d. The current
in the top wire is n1I0, and the current in the bottom
wire is n2I0. The magnetic field B at a point midway between
the two wires is B = n3 μ0 I0/(2 π d)
k, where k points out of the page. What is n3?
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