Dynamo-electricity: its generation, application, transmission, storage and measurement (1884)
Prescott, George B. (George Bartlett), 1830-1894 · New York, D. Appleton · leaf 874
in thecircuit When there is any deviation from the proper deflec-tion, caused by a change in the number of lamps, the electromotive force should be altered until the required deflection isrestored. Fig. 540 shows a direct circuit dynamo supplying a numberof arc lamps, L L, in series ; the strength… … Fig. 540. stant, the current strength varying with the number of lamps.To measure the electro motive force, it is only necessary to con-nect a voltmeter to the binding screws of the dynamo. Whenthe deflection of the voltmeter varies from the normal, thedynamo should be adjusted until the standard…
Electrical engineering
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