What is Electricity?D. Appleton and Company, 1903 - 315 pagini |
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Pagina 36
... motor which well illustrates the formation of consequent poles . An inventor claimed that he had discovered a neu- tral line in the space near the poles of a horseshoe magnet . His motor con- sisted of an armature of soft iron ( N S ...
... motor which well illustrates the formation of consequent poles . An inventor claimed that he had discovered a neu- tral line in the space near the poles of a horseshoe magnet . His motor con- sisted of an armature of soft iron ( N S ...
Pagina 37
... motor did not run from this cause . For many years there was no substantial change in the form of the ship's compass . One or more compara- tively heavy bar magnets were affixed to a card bearing the points of the compass , and the card ...
... motor did not run from this cause . For many years there was no substantial change in the form of the ship's compass . One or more compara- tively heavy bar magnets were affixed to a card bearing the points of the compass , and the card ...
Pagina 85
John Trowbridge. the wire connecting the dynamo at the central station with the motor in the electric car . It may be said to converge upon the motor in the car , and is there recon- verted into motion . The flow of current , or the rate ...
John Trowbridge. the wire connecting the dynamo at the central station with the motor in the electric car . It may be said to converge upon the motor in the car , and is there recon- verted into motion . The flow of current , or the rate ...
Pagina 92
... motor which is now used to propel electric cars . The galvanometer , we have seen , consists in its essentials of a coil or bobbin of wire like a spool of thread with a tiny magnet hung by a spider thread near one end of the spool ...
... motor which is now used to propel electric cars . The galvanometer , we have seen , consists in its essentials of a coil or bobbin of wire like a spool of thread with a tiny magnet hung by a spider thread near one end of the spool ...
Pagina 100
... motor . I dwell at some length , therefore , upon this simple practical detail , to illustrate how greatly the advance of science depends upon the ad- vance of the mechanic arts . The machines for cover- ing copper wire and the ...
... motor . I dwell at some length , therefore , upon this simple practical detail , to illustrate how greatly the advance of science depends upon the ad- vance of the mechanic arts . The machines for cover- ing copper wire and the ...
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Termeni și expresii frecvente
action alternating current apparatus attraction bodies carbon cathode rays centimetres charged circuit coil of wire conductor connected copper copper wire Crookes tube current of electricity detect direction discharge distance dynamo dynamo machine earth effect elec electric current electric spark electric waves electrical energy electrical machine electro-magnetic electro-magnetic waves electro-motive force employed ether excited experiments Faraday fluid galvanometer glass gravitation horse power Illustrations inch insulated iron J. J. Thomson lamp Leyden jar lines of force lines of magnetic magnetic force manifestations means measure medium metals method mirror molecular molecules motor movement needle obtained ordinary oscillations oxygen pass phenomena phenomenon photograph pipes placed plate polarization pressure produced Prof refraction resistance revolving Ruhmkorff coil self-induction south pole space spark gap spool steam engine storage battery suitable telephone terminals theory tion to-and-fro currents transformations of energy transmitted tric tricity tube velocity vibrations voltaic cell zinc
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Pagina 262 - In extending the researches relative to this part of the investigations, a remarkable result was obtained in regard to the distance at which inductive effects are produced by a very small quantity of electricity; a single spark from the prime conductor of the machine, of about an inch long, thrown on the end of a circuit of wire in an upper room, produced an induction sufficiently powerful to magnetize needles in a parallel circuit of wire...
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Pagina 199 - Electrical matter differs from common matter in this, that the parts of the latter mutually attract, those of the former mutually repel each other.