An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 346
Fig. 217. Curves of e.m.f. and current inphase. … both be drawn on the same horizontal base line. Figure 217shows an e.m.f. and also a curve of current in phase. It willbe noticed that the current and voltage are both at zero at the same instant, both passthrough their maximum.current values at the same in- 360° w_^ stant, and in fact keep instep…
Electricity · Magnetism
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