Elementary lessons in electricity and magnetism (1906)
Thompson, Silvanus P. (Silvanus Phillips), 1851-1916, Schwetzky, Otto H. L. [from old catalog] · Chicago, Thompson & Thomas · leaf 307
:hap. v.] electricity AND MAGNETISM. 1289 329), having a long movable iron core is used. Forgiving a very quick-acting magnet the coils should notbe wound all along the iron, but only round the poles.As a rule the iron parts, including the yoke and arma- … Fig. 117. ture, should form as nearly as possible a closed magneticcircuit. The cross-sections of yokes should be thickerthan those of the cores, 328. Lifting-power of Electromagnets.—Thelifting-power of an electromagnet depends not only on itsmagnetic strength,^ but also upon its form, and on…
Electricity · Magnetism
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