Question

Two long straight wires are parallel and carry current in the same direction. The currents are 8.0 and 12 A and the wires are separated by 0.40 cm. The magnetic field at a point midway between the wires is:
A) 0 T
B) 4.0 x10-4T
C) 8.0 x10-4T
D) 12 x10-4T
E) 20 x10-4T

Answer

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