Modern electricity and magnetism, theoretically and practically considered (1885)
Avery, Elroy M[cKendree], 1844- [from old catalog] · New York and Chicago, Sheldon and company · leaf 171
anentmagnet near the end of the soft iron. In this case, theinduced currents are due to the varying magnetism of thesoft iron, this magnetism being due, in turn, to the in-ductive influence of the permanent magnet. Thus w^esee that ivhen the intensity of the magnetism of ahar of iron or steel is… … 464. The Wheel Armature.—Imagine the softiron bar in the helix of Fig. 341 to be grooved and severaltimes as long as the helix through which it passes. Imag-ine the ends of this bar to be brought together so as to form a complete ironring carrying oue helix.If the number of helicesupon the ring be…
Electricity · Magnetism
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