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Four long conducting wires are parallel to each other. Their cross sections form the corners of...

Four long conducting wires are parallel to each other. Their cross sections form the corners of a square of side 10.6 cm. The directions of the currents are as shown in the figure. ?1 = 1.89 ?, ?2 = 7.18 ?, ?3 = 8.77 ?, and ?4 = 4.79 A. What is the magnitude of the magnetic field at the center of the square?

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