Elementary treatise on electricity and magnetism : founded on Joubert's "Traité élémentaire d'électricité" (1909)
Foster, G. Carey (George Carey), Porter, Alfred William, 1863-1939, Joubert, Jules François · London : Longmans · leaf 456
Fig. 282. if it is negative. When the difference of phase is equal to - A (Fig. 282), the attraction and repulsion are equal both in intensityand in duration, and the resulting effect is therefore nothing. But if the difference of phase exceeds -, and it always does exceed this •2t value, repulsion… … Fia. 283. which the effect of repulsion may give lise to a continuous rotatorymotion. In that shown in Fig. 284, a copper disc, B, mounted ona spindle, rotates rapidly when it is placed excentrically in refer-ence to the alternating pole, and when another disc, a, partlyscreens the first. If the…
Electricity · Magnetism
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