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: O OT 4.0 x 10-4 T O 8.0 x 10-4T O 12 x 10-4 T O 20 x 10-4T
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