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 363
If the current happens to lag 90°behind the voltage, as shown infigure 229, then the negative loopsjust equal the positive loops, andall the power absorbed by the cir-cuit during one quarter-period is returned during the next. This curve could be possible onlywhen there was no resistance but just… … Fig. 229. — Power loops whencurrent lags 90°. INDUCTANCE AND CAPACITY 333 only) is always equal to the product of the volts times the am-peres (whether the current is alternating or direct). In thiscase the alternating current is in phase with the voltage. Butin a circuit containing both resistance…
Electricity · Magnetism
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