Thomälen, Adolf, 1865-, Thomälen Adolf. Kurzes Lehrbuch der Electrotechnik. English · London, E. Arnold · leaf 77
ty or permeability is much greater than that ofair. The ratio of this permeability to that of the air is represented by theGreek letter /a. The permeability jn gives, therefore, the magneticconductivity of the iron compared with air; other things being equal,the number of lines produced in the iron… … Fig. 55 The value of fi depends above all on the quality of the iron. The per-meabihty of annealed armature stampings or of mild cast magnet steelmay sometimes exceed 3000. The permeability of a given piece of ironor steel varies moreover with the degree to which it is magnetised. The experimental…
Electrical engineering
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