Three Long, Straight, Parallel Wires Each Carry a Current of 10

question 94

Multiple Choice

Three long, straight, parallel wires each carry a current of 10 A in the positive x direction. If the distance between each wire and the other two is 10 cm, what is the magnitude of the magnetic force on a 20-cm length of either of the wires?

• A) 57 μN
• B) 40 μN
• C) 69 μN
• D) 50 μN
• E) 20 μN

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