Electricity experimentally and practically applied; a book for the beginner and for the practical man, principles, experiments, practical applications and problems (1910)
Ashe, Sydney Whitmore · New York, D. Van Nostrand company · leaf 41
ters. — Many types of instrumentshave been developed in the past for the measurement ofcurrent and electromotive force. Such instruments aretermed ammeters and voltmeters. They utilized certaineffects of the current, such as the attraction of a solenoidfor a core of iron and the effect of… … Fig. 28. — Thomson Recording Wattmeter. rate, were not dead-beat, and required some time beforethe needle, or pointer, would come to rest. The develop-ment of the DArsonval type of instrument with permanentmagnets and movable coil marked a great step in advancein instrument making. Dr. Edward…
Electricity · Electrical engineering
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