four long parallel wires are oriented. perpendicular to the plane of the figure. In cross section they form a square of side 9=17.0cm. Point P is at the center of the square. If each wire is carrying the same magnituore of current I=18.0A in the directions shown, find the magnitude and direction of the net magntic field due to the wres at point P. Explain and identify each step and formulas. a а

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