60. In the iron core in the form of a torus having an average diameter d = 70 mm is wound with the winding total number of turns N = 600. The core is made narrow transverse slit width b = 1,5 mm. When a current through the winding I = 4 A magnetic induction into the slots B0 = 1.5T. Neglecting scattering field at the edges of the slots determine the permeability of iron for the given conditions.

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)