Question

Four long, straight wires are parallel to each other and their cross-section 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.

Answer 1

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