Practical applied electricity; a book in plain English, for the practical man. Theory, practical applications and examples (1911)
Moreton, David Penn, 1882- · Chicago, The Reilly & Britton co · leaf 163
by multi-plying the ammeter reading, in amperes, by the voltmeterreading, in volts, or W = IE (96) Thus the power taken by the ten incandescent lamps shownin Fig. 112 can be determined by connecting the ammeter(A) and the voltmeter (V), as shown in the figure, and notingtheir indication when the… … Ten Lamps Fig. 112 ammeter indicates the current through the lamps and volt-meter combined. This results in a small error in the cal-culation of the power taken by the lamps, provided thecurrent through the voltmeter is small in comparison tothe current through the lamps. For very accurate…
Electrical engineering
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