Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1903)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 259
rgecurrent. 237. Measuring High Voltages with a Low Range In-strument.—Suppose it is desired to measure the potential dif-ference between a trolley line and the track which is about 550volts, and only a 150 volt instrument is available. Connect five 110-volt lamps in seriesand to the track and… … 30 VOLTS 238. Measurements witha Voltmeter.— Exp. 65: Four spools of wireA, B, C, and D, Fig. 215, withresistances of 2, 3, 4, and 6 ohms respectively, are connected in ser-ies and to a battery. The spools may represent lamps, magnets, or Fig. 215-Drop -Measuring the Volts with a Voltmeter.…
Electricity · Magnetism
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