Elementary treatise on electricity and magnetism : (1905)
Foster, G. C. (George Carey), 1835-1919, Joubert, J. (Jules François), 1834-1910, Porter, Alfred W. (Alfred William), 1863-1939 · London ; New York ; Bombay : Longmans, Green, and Co. · leaf 416
r the electromotive force at any time t _ ^Trt E=Ea sin a = Eg sin uyt = E^ sin -—. In such a case the electromotive force is said to vary harmonic ally.A variation of this kind is expressed gi^aphically by the oi-dinatesof the sign-curve gab (Fig. 278). In this figure the distance obrepresents… … Fig. 278. G^EjR. The maximum strength of current would be EJR, andthe current at any instant would be (7=^sin ^„ that is, the current would also vary harmonically in the sameperiod as the electromotive force, and might be lepresented by asimilar sine-curve, having the same period and having zero…
Electricity · Magnetism
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