Elementary treatise on electricity and magnetism (1903)
Foster, George Carey, 1835-1919, Joubert, Jules François, 1834-1910. Traité élémentaire d'électricité, Porter, Alfred William, 1863- joint author · London, New York, Longmans, Green, and co. · leaf 298
nduction may now be writtenB = F + iwA = (1 -f- iiTK) F. The factor (1 -|- 4?rK), which expressesthe relation between the induction and the field, is called themagnetic permeability of the substance. Denoting it by /x we write 5 = /xi?. The permeability is greater than unity for magnetic… … INDUCTION 1 POLAR-HELD Fig. 174. 276 MAGNETIC INDUCTION [201- substances, k and fj, may be considered as constant numericalcoefficients, but for iron and similar substances they are verycomplicated functions. For a given substance under otherwiseuniform conditions they vary with the magnetising…
Electricity · Magnetism
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