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Lessons in practical electricity; principles, experiments, and arithmetical problems; over four hundred illustrations; an elementary text book (1909)

Swoope, C. Walton (Coates Walton), d. 1901 · New York, D. Van Nostrand company · leaf 167

An illustration from Lessons in practical electricity; principles, experiments, and arithmetical problems; over four hundred illustrations; an elementary text book, 1909, leaf 167
heostat is to absorb electricalenergy, and this energy, which appears as heat, is wasted in-stead of peiforming any useful work. A rheostat may beconstructed of coils of iron wire, iron plates or strips; car-Don, either pulverized in tubes or in the form of solid rodsor discs; German silver,… … Fig. 123.—Commercial Type ofRheostat. CIRCUITS AND THEIR RESISTANCE. 149 4^ If %,. X v \v o \ *o ^* V r ^ 3 ! 1 Fig. 124.—Commercial Rheostat. Diagram of connections of theresistance coils. regulating the current in commercial electric circuits no greatdegree of accuracy of the resistance coils is…

Electricity · Magnetism

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