The Figure Shows a Cross Section of Three Parallel Wires

question 91

Multiple Choice

The figure shows a cross section of three parallel wires each carrying a current of 20 A.The currents in wires A and B are out of the paper,while that in wire C is into the paper.If the distance R = 5.0 mm,what is the magnitude of the force on a 2.0-m length of wire A?

• A)23 mN
• B)64 mN
• C)32 mN
• D)46 mN
• E)55 mN

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