Three Long, Straight, Parallel Wires All Lie in the Yz

question 17

Multiple Choice

Three long, straight, parallel wires all lie in the yz plane and each carries a current of 20 A in the positive z direction. The two outer wires are each 4.0 cm from the center wire. What is the magnitude of the magnetic force on a 50-cm length of either of the outer wires?

• A) 1.0 mN
• B) 0.50 mN
• C) 1.1 mN
• D) 1.5 mN
• E) 2.0 mN

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