What is Electricity?D. Appleton & Company, 1896 - 315 pagini |
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Pagina 9
... copper wire , and to the want of a sufficiently sensitive instrument to de- tect it . The story of the discovery of magnetic induction by Faraday and Henry is most instructive , for it shows how an apparently slight and unimportant ...
... copper wire , and to the want of a sufficiently sensitive instrument to de- tect it . The story of the discovery of magnetic induction by Faraday and Henry is most instructive , for it shows how an apparently slight and unimportant ...
Pagina 23
... copper , bis- muth , glass , sulphur , gutta - percha . It was thought that the stopping of the up - and - down motion in the line of gravity would produce contrary effects to the coming on of the motion , and that whether the stopping ...
... copper , bis- muth , glass , sulphur , gutta - percha . It was thought that the stopping of the up - and - down motion in the line of gravity would produce contrary effects to the coming on of the motion , and that whether the stopping ...
Pagina 46
... copper wire carrying an electrical current , file the ends square , place a sheet of writing paper between the ends and press them together : the current which was transmitting thousands of horse power is stopped ; it is incapable of ...
... copper wire carrying an electrical current , file the ends square , place a sheet of writing paper between the ends and press them together : the current which was transmitting thousands of horse power is stopped ; it is incapable of ...
Pagina 48
... copper wire carrying a current is revolved many times a minute before the pole of a powerful magnet a fluctuating effect can be produced which would be sufficient to make the electric lights of the steamship fed by this current blink ...
... copper wire carrying a current is revolved many times a minute before the pole of a powerful magnet a fluctuating effect can be produced which would be sufficient to make the electric lights of the steamship fed by this current blink ...
Pagina 49
... copper wire conveying an electric current resides in the development of heat along the conductor . If we should narrow the bore of a steam pipe to the size of a knitting needle , we should greatly restrict the flow of steam through the ...
... copper wire conveying an electric current resides in the development of heat along the conductor . If we should narrow the bore of a steam pipe to the size of a knitting needle , we should greatly restrict the flow of steam through the ...
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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.