Two Long Parallel Wires Are Separated by 4

question 75

Multiple Choice

Two long parallel wires are separated by 4.0 cm. One of the wires carries a current of 20 A and the other carries a 30-A current. Determine the magnitude of the magnetic force on a 2.0-m length of the wire carrying the greater current.

• A) 7.0 mN
• B) 6.0 mN
• C) 8.0 mN
• D) 9.0 mN
• E) 4.0 mN

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Indirect Method

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