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 400
e current through the fields and r equals thearmature resistance. A voltmeter, therefore, placed acrossthe brushes of any self-exciting dynamo indicates the poten-tial difference ratherthan the E. M. F.If the field rheostatis adjusted for anyparticular voltagewith the main cir-cuit open, say… … Fig. 363.—Regulating the E. M. F. at the Brushesof a Shunt dynamo by the Shunt Field Rheostat. causes: first, there is an increased drop in the armature dueto the additional current flowing through it, which lowers thepotential difference at the brushes ; second^ the potentialdifference at the…
Electricity · Magnetism
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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