Magnetic field lines are always nearly normal to the surface of a ferromagnet at every point. (This fact is analogous to the static electric field lines being normal to the surface of a conductor at every point.) Why?

Explanation

(e) This is because of uniform distribution of magnetic dipoles, perpendicular to the cross-section of a ferromagnet which compels the magnetising field lines to be incident normally (perpendicularly) on the surface at the ends.