Magnetic Design Contact Dexter Eight Magnetic Axioms Careful consideration of these axioms will clearly show the causes of leakage and fringing flux. Flux lines, like electrical currents, will always follow the path of least resistance.
Flux lines repel each other if their direction of flow is the same.
They therefore can only travel in straight lines or curved paths, and they can never take true right-angle turns. Flux lines will always leave and enter the surfaces of ferromagnetic material at right angles. Below the level of saturation, a ferromagnetic material will substantially contain the flux lines passing through it. Flux lines will always travel from the nearest north pole to the nearest south pole in a path that forms a closed loop. Magnetic poles are not unit poles.