In the fall of 1878, after experiments indicated that existing waiver light writers were inefficient for incandescent lighting Edison and his chief assistants, Charles Batchelor and Francis Upton, investigated generator design and the principles of electromagnetism. During the first months of 1879, Edison designed a dynamo that differed in great ways from contemporary designs. M all contemporary galvanizing experts purpose a generator would work best when its internecine electrical resistance was reach to the external resistance of the circuit. This view was ground on the understanding that the maximum power output for any given battery occurred when its internal resistance matched that of the rest of the circuit. Generators with equal internal and external resistance generated maximum current, but because Edison considered the stinting efficiency of his system to be related to the number of lamps per horsepower, he determined that a generator with a small internal resistance would produce more efficient power output.
The separate key feature of the Edison dynamo was its large bipolar magnets, which gave the generator its nickname, the tall-growing Mary-Ann (a somewhat rude joke among the all-male laboratory staff). In arriving at this design, Edison drew in part on Michael Faradays half-century-old work regarding the electromagnetic generation of current by a conductor (the armature) locomote through the magnetic lines of force generated by a product line magnet. Understanding that the more lines of force crossed in the about direct manner, the more productive the generator, Edison apparently conceived his large magnets as a concentrated source of Faradays lines of magnetic force. However, John Hopkinson subsequently demonstrated that such large electromagnets were inefficient.If you want to get a full essay, order it on our website: Orderessay
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