Two Long, Straight, Parallel Wires Separated by a Distance D

question 52

Multiple Choice

Two long, straight, parallel wires separated by a distance d carry currents in opposite directions as shown in the figure. The bottom wire carries a current of 6.0 A. Point C is at the midpoint between the wires and point O is a distance 0.50d below the 6-A wire as suggested in the figure. The total magnetic field at point O is zero tesla.
-Determine the value of the current, I, in the top wire.

• A)2 A
• B)3 A
• C)6 A
• D)18 A
• E)This cannot be determined since the value of d is not specified.

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