Electrical Engineering ⇒ Topic : Refraction of Magnetic Flux

Refraction of Magnetic Flux

When magnetic flux passes from one medium to another of different permeabilities, the magnetic flux gets refracted at the boundary of the two media [See Fig. (a) ]. Under this condition, the following two conditions exist at the boundary (called boundary conditions)

                                        figure (a)

(1) The normal components of magnetic flux density are equal i.e.

                                 B_1n = B_2n

(2) The tangential components of magnetic field intensities are equal i.e

                                    H_1t = H_1t

As proved in Art., in a similar way, it can be proved that

This relation is called law of magnetic flux refraction.