Elementary treatise on electricity and magnetism (1903)
Foster, George Carey, 1835-1919, Joubert, Jules François, 1834-1910. Traité élémentaire d'électricité, Porter, Alfred William, 1863- joint author · London, New York, Longmans, Green, and co. · leaf 423
agnetic field at the common centre remains of constant magni-tude, but its direction rotates at a uniform rate. For if Hcosmtand H sin (lit be the two fields at right angles, the resultant B isgiven by the square root of the sum of their squares (Fig. 285);that is, B= sjm sin2 (oi! + H^ cos^ wt=… … HsinUt s-^ HcosCJt Fig. 284. Fig. 285. richt 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 the…
Electricity · Magnetism
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