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 306
Fig. 2r>4.—Dynamometer Ammeter for Alternating or Direct Currents. Portable Form. ELECTROI) YNA MIC8. 2*7 … 60OLAt.«ra expended in a circuit is equal to the product of the volts, E,and the current C, or W = E X C3 Formula (62). Thesefactors may be determined bya volt and an ammeter andmultiplied together, or themultiplication may be auto-matically performed by usinga form of Siemens dynamom-eter which…
Electricity · Magnetism
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