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 457
tmagnetic field at the common centre remains of constant magni-tude, but its direction rotates at a uniform rate. For if ^cosw^and Hsinu)t be the two fields at right angles, the resultant R isgiven by the square root of the sum of their squares (Fig. 285);that is, R= JH^ sin2 (at + H^ cos2 (at=… … HsinlOt /Y Fig. 284. HcosWt Fig. 285. ri<Tht angles to the resultant field. If this coil be held fixed, thelines of induction threading it will change in number as the fieldrotates, decreasing from a positive maximum, when the axis of thefield coincides with the axis of the coil, to zero when…
Electricity · Magnetism
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