The figure shows a cross section of three parallel wires each carrying a current of 15 A. The currents in wires A and B are into paper, while that in wire C is out of the paper. If the distance R = 5.0 mm, what is the magnitude of the force on a 4.0-m length of wire C?
s.yimg.com/tr/i/a6d30fc80f3e44748021af2b584cddb3_A.png
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