International Library of Technology · Scranton, International Textbook Co. · leaf 271
circuit in which the power expended is to be measured isshown by be. A non-inductive resistance R is connected inseries with b c, so that the current flowing through R is the 2644 THEORY OF ALTERNATING same as that flowing through the circuit in question. Readings are then taken of the three… … Fig. 1506. readings with one voltmeter without going beyond therange of the instrument, by having an arrangement forswitching the voltmeter onto the different parts of the cir-cuit to be measured. At any instant during a cycle, thesum of the instantaneous values of E^ and E^ must be equalto the…
Electrical engineering
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