Lessons in practical electricity; principles, experiments, and arithmetical problems; over four hundred illustrations; an elementary text book (1909)
Swoope, C. Walton (Coates Walton), d. 1901 · New York, D. Van Nostrand company · leaf 253
arallel. If one lampis then turned out the other lamp receives a greater pressurethan 50 volts, since the drop on the leads and internal resistanceis less when the current through them is diminished. TheE. M. F. must therefore be decreased as the current is de-creased and increased when the current… … d.30Km* EMF.450V]ED. 360V fcD.ILamt> •45V end-cell switch. In a dyna-mo the E. M. F. is varied45V by increasing or decreas-ing the field strength of the electromagnets. Prob. 91: Eight arc lampsare connected in series toa series dynamo, Fig. 20!),Fig. 209.-KM.F.and Potential Difference (,ich…
Electricity · Magnetism
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