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 441
ded, for thetransmitting instrument itself generates the inducedcurrents as follows : The magnet AA induces a certainnumber of lines-of-force through the coil C. Many ofthese pass into the iron disc. When the iron disc invibrating moves towards the magnet-pole, more Hnes-dfforce meet it; when it… … Fig. 168. 4i6 ELEMENTARY LESSONS ON [chap. xii. the coils currents whose strength is proportional to therate of change in the number of the lines-of-force whichpass through the coil. Bells telephone, when used asa transmitter, may therefore be regarded as a sort ofmagneto-electric generator, which,…
Electricity · Magnetism
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