Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 875
force and current strength ; but it isalways desirable to continuously measure both, as just described,whatever regulating devices may be employed. Lamp Measurements.—The resistance of a lamp while burning,commonly called its hot resistance, may be calculated from theformula, »-=- (19), c where the… … Fig. 541 To Measure the Efficiency of an Arc or Incandescent Lamp.—Thelamp being placed in a photometer (fig. 642), where its illumi-nating power can be measured, it is connected through the cur-rent galvanometer, G, to the battery or current generator, E, andthe circuit is then completed through…
Electrical engineering
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