Three wires carrying current are arranged as shown below. If wire 1 carries current 1.3 A, wire 2 carries current 3.2 A and sits a distance 1.2 m away from wire 1, then what must the current be in wire 3 (which sits a distance 4.2 m away from wire 2) in order for the net force on wire 2 to be zero? 12 13 rl r2
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