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4. Two infinitely long, straight, parallel wires are carrying
currents in the same direction. Wire A has a current of 3.2
amps, whereas wire B has a current of 7.3 amps. The
distance between the wires is 4.20 cm. Calculate the total
magnitude and direction of the magnetic field at a point
which is 1.50 cm from wire A.
(m, = 4p x 10-7 T-m/A)

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