Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 407
100 amperes at112 volts to a group of lamps located 75 feet from the generator. Re-sistance of leads .02 ohm ; armatuie .01 ohm ; series coil .02 ohm ;shunt coil 40 ohms ; 14 K. W. are required to drive the machine,Fig. 370. Find tbe following : (a) P. D. at brushes ; (b) total E. M. F. generated;… … Fig. 370.—E. M. F. and P. D. of a Compound Wound Dynamo. By Formula (29) E = C X R = 100 X .02 = 2 volts drop in leads.112 + 2 := 114 volts P. D. at terminals.(29) E = G X R = 100 X .02 = 2 volts drop on seriesfield.114 + 2 = 116 volts P. D. at brushes (a).116 volts across shunt field. wc = |=^«…
Electricity · Magnetism
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