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 243
a Battery.—ByI J efficiency is meant the relation of the useful {^^^^^^r^^] work done to the total energy ex]iende(].6V0J19 n A perfect battery, or dynamo (that is, oneFig. 201.— Volts with no internal resistance), would deliverLost on the Inter- ^H of the enerp-y to the external circuit, butnal… … I—JviftV —I ELECTRICAL WORK AXD POWER. 225 by 100, and one-half of this amount is unavailable for usefulwork, the etiiciency would be 50 per centum or 50 per cent.In no machine, then, can the efhciency be 100 per cent. To Find the Efficiexcy of a Battery : Divide the resistance of the external…
Electricity · Magnetism
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