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The figure shows the cross section through 3 long wires with linear mass density 100 g/m.They carry currents I1,I2,and I3 in the directions shown.Wires 2 and 3 are 10 cm apart and are attached to a vertical surface,and each carry a current of 600 A.What current I1 will allow wire 1 on the right to "float" such that its distance from the vertical surface is 10 cm?
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