Heaviside, Oliver, 1850-1925 · London : Macmillan · leaf 410
, P, at the first, second, third, and fourthroots of2; = 0. There are an infinite number of other normal systems,corresponding to the higher roots. The normal system v^ divides thecore into a solid central cylinder, surrounded by m - 1 concentric tubes,at whose boundaries the magnetic force… … The time-constant measuring the slowness of subsidence of a normal system is -l/D^iTT/x/pn^, THE INDUCTION OF CURRENTS IN CORES. 389 thus being proportional to the magnetic permeability, to the conduc-tivity, to the sectional area of the core, and inversely to the square ofna. Of all metals except…
Electricity
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