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 40
e orresistance to rotation, due to its magnetic field. This effectvaries directly zuith the speed of the meter disc or produces a load vv^hich varies with the speedof the meter. This matter is dis-cussed at greater length underrecording wattmeters. By mov-ing the magnets, Fig. 28, in orout so that… … Fig. 27. — M.ignets of ThomsonRecording Wattmeter. MAGNETISM 19 Ammeters and Voltmeters. — 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,…
Electricity · Electrical engineering
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