47. (II) Let two long parallel wires, a distance d apart,
Chapter 20, Problem 47(choose chapter or problem)
47. (II) Let two long parallel wires, a distance d apart, carry equal currents 1 in the same direction. One wire is at x = 0. the other is at .v = d, Fig. 20-61. Determine B along the x axis between the wires as a function of .v.
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