What is Electricity?D. Appleton & Company, 1896 - 315 pagini |
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Pagina 22
... needle of a delicate galvanometer remained absolutely quiet if the galvanometer were connected with a coil which was moved across or along the lines of gravitating force . What led Faraday to suppose that an effect could be observed by ...
... needle of a delicate galvanometer remained absolutely quiet if the galvanometer were connected with a coil which was moved across or along the lines of gravitating force . What led Faraday to suppose that an effect could be observed by ...
Pagina 30
... needle that led Faraday to his great discovery of induction and the conversion of mo- tion into electricity . We have learned since 1830 a great deal about the magnetic properties of soft iron under electrical influences , we know ...
... needle that led Faraday to his great discovery of induction and the conversion of mo- tion into electricity . We have learned since 1830 a great deal about the magnetic properties of soft iron under electrical influences , we know ...
Pagina 33
... needle suspended from its middle , the line along which a south pole , if it could be separated from its north pole , would travel toward the north pole of the earth - and is struck a sharp blow with a hammer , it will become magnetic ...
... needle suspended from its middle , the line along which a south pole , if it could be separated from its north pole , would travel toward the north pole of the earth - and is struck a sharp blow with a hammer , it will become magnetic ...
Pagina 47
... needle remains quiescent . The neighbouring pipes are not attracted or repelled from each other . This is not true in the case of the electrical transmission of power . A compass needle instantly points to the wire carrying the current ...
... needle remains quiescent . The neighbouring pipes are not attracted or repelled from each other . This is not true in the case of the electrical transmission of power . A compass needle instantly points to the wire carrying the current ...
Pagina 49
... needle , we should greatly restrict the flow of steam through the pipe and reduce the amount of horse power that was previously transmitted . The same is true of a water pipe : the flow of water is greatly im- peded by the constriction ...
... needle , we should greatly restrict the flow of steam through the pipe and reduce the amount of horse power that was previously transmitted . The same is true of a water pipe : the flow of water is greatly im- peded by the constriction ...
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Termeni și expresii frecvente
action alternating current apparatus attraction body 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 flow 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 tricity tube velocity vibrations voltaic cell zinc
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Pagina 314 - SOUND : a Series of Simple, Entertaining, and Inexpensive Experiments in the Phenomena of Sound, for the use of Students of every age.
Pagina 296 - ... of our planet, so far as we know it; and nitrogen is very far the predominant constituent of our atmosphere. If the earth is a detached bit whirled off the mass of the sun, as cosmogonists love to tell us, how comes it that in leaving the sun we cleaned him out so completely of his nitrogen and oxygen that not a trace of these gases remains behind to be discovered even by the sensitive vision of the spectroscope...
Pagina 256 - 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...
Pagina 313 - Part I. MECHANICS, HYDROSTATICS, and PNEUMATICS. Part II. HEAT. Part III. ELECTRICITY and MAGNETISM. Part IV.
Pagina 118 - Faraday, in his mind's eye, saw lines of force traversing all space where the mathematicians saw centres of force attracting at a distance : Faraday saw a medium where they saw nothing but distance : Faraday sought the seat of the phenomena in real actions going on in the medium, they were satisfied that they had found it in a power of action at a distance impressed on the electric fluids.