94.29: Four infinitely lon
fuz,u;x 3w m7g6m*di wg wires are arranged as shown in the accompanying figure’s end-on view. All four wires are perpendicular to the plane of the page a
z;dmwu6mg7,xifuw *3 nd have the same magnitude of current I. The conventional current in the wire in the upper right-hand corner is directed into the plane of the page. The other conventional currents are out of the plane of the page. Point P is a distance a from all four wires. What is the total magnetic field at point P?