The Figure Shows the Cross Section Through 3 Long Wires

question 54

Multiple Choice

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?

• A)1021 A
• B)512 A
• C)700 A
• D)256 A

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