Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 237
es and decreases with the voltage, oris in phase withthe voltage, as shown in Fig. 237. The power in such a circuit is zero at the instants a, b, c and dwhen both voltage and current are zero but is positive at all otherinstants, that is energy is put into the circuit but none is taken outagain.… … Fig. 237.—Voltage e, current i and power e X tin a resistance circuit. where E and / are effective values, see page 198. Thus, in a non-inductive circuit, the power is the product of the effective voltageand the effective current. 245. Resistance and Inductance in Series.—If an alternatingcurrent I…
Electrical engineering
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