The figure below shows four long, parallel wires passing through the corner of a square plate with a side of 5.0 cm. Each of the four conductors carries a current of 3.5 A in the direction indicated in the figure. Determine the magnetic field at the center of the plate.

• A. 0 T
• B. 1.98 × 10^-5 T, in the positive z-direction
• C. 5.61 × 10^-5 T, in the positive x-direction
• D. 5.61 × 10^-5 T, in the negative y-direction

Answer: (C)