Magnetic Induction Physical definition: The process in which an external magnetic field (H-field) causes magnetic dipoles within a material to align, creating an internal field (B-field). Field and particle behavior: Dipoles rotate to align with H. B = μ₀(H + M). Field line pattern: Lines radiate from the north pole (N) outwards to the south pole (S); they are denser inside the material and continuous outside. Analytical note: It is a continuous phenomenon, with the initial curve on the B–H diagram (linear section). See more