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 306
ith a different number of turns, each of whichis inserted in series with the movable coil and brought out toseparate posts. Thus, if it is desired to measure a currentknown to be between one-tenth and 1 ampere, the right-handbinding posts are used, and if between 1 and 100 amperes,the left-hand… … expended in a circuit is equal to the product of the volts, E7and the current C, or W = EX C3 Formula (62). Thesefactors may be determined by ^ « a volt and an ammeter andmultiplied together, or themultiplication may be auto-matically performed by usinga form of Siemens dynamom-eter which measures…
Electricity · Magnetism
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