Magnetic Field of a Wire

The transfer of spin from one charge to the next along a wire, which is current, also causes the charges in the wire to acquire spin in the plane perpendicular to the wire, resulting in a magnetic field. This spin, and the resulting magnetic fields of the charges, has the same orientation for all the charges along the wire because these fields can be thought of as “stacked” sort of like a stack of records on a turntable, or clutch plates, so that if one of the fields rotates, the rest of the fields in the stack are dragged into rotation with the same orientation. Current in the wire causes spin in the perpindicular magnetic planes of the charges because they have a somewhat staggered arrangement with respect to each other along the wire. They assume such a staggered arrangement because this allows charges with like spins, which repel, to distance themselves from each other to a greater extent. This staggered arrangement of charges along the wire allows spin in their magnetic planes to be created by the “bevel and miter” mechanism described above.