Electrical instruments and testing; how to use the voltmeter, ohmmeter, ammeter, potentiometer, galvanometer, the Wheatstone bridge, and standard portable testing sets (1907)
Schneider, Norman H. (Norman Hugh), Hargrave, Jesse · New York, Spon & Chamberlain; [etc., etc.] · leaf 196
Fig. 95. … Fig. 96. These e.m.fs. being plotted on a chart give agraphic record of the distribution of field flux. Another method is Fig. 96, where one movablebrush is used, the other voltmeter connectionbeing on one of the regular working brushes. 174 ELECTRICAL INSTRUMENTS. This shows a gradual rise or fall…
Electric testing · Electric apparatus and appliances
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