Physics
posted by Brynlie .
Four long, straight wires are parallel to each other and their crosssection forms a square. Each side of the square measures 0.0112 m. If each wire carries a currrent of 8.33 A in the direction shown, find the magnitude of the total magnetic field at P, the center of the square.

Find the B due to one wire, and add or subtract the B (same magnitude) in accordance with the right hand rule.