Two Long Straight Wires Are Parallel and Carry Current in Opposite

question 22

Multiple Choice

Two long straight wires are parallel and carry current in opposite directions. The currents are 8.0 A and 12 A and the wires are separated by 0.40 cm. The magnetic field in tesla at a point midway between the wires is:

• A) 0
• B) 4.0 * 10^-4
• C) 8.0 * 10^-4
• D) 12 * 10^-4
• E) 20 * 10^-4

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