Dynamo electric machinery; its design, construction, and operation; direct-current machines (1915)
Sheldon, Samuel, 1862-1920, Hausmann, Erich, 1886- joint author · New York, D. Van Nostrand Company; · leaf 321
Multipliers should be wound non-inductively with wire having a negligible temperature coefficient ofresistance. Wattmeters. The power delivered to direct-current re-ceiving circuits may be determined from voltmeter andammeter readings, or may be measured directly by meansof a wattmeter. This… … Fig. 202. The deflecting force is proportional to the product of thecurrents flowing in the two windings, but the current flow-ing in the movable coil is proportional to the voltage of thecircuit; therefore the deflecting force is proportional tothe product of the current supplied and the voltage,…
Electric machinery
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