In the figure, four long straight wires are perpendicular to the page, and their cross sections form a square of edge length a = 19 cm. The currents are out of the page in wires 1 and 4 and into the page in wires 2 and 3, and each wire carries 25 A. What is the magnitude of the net magnetic field at the square's center? O - X Number i Units C eTextbook and Media Hint Save for Later Attempts: 0 of 5 used Submit