What is Electricity?D. Appleton & Company, 1896 - 315 pagini |
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Pagina 9
... lamp which was sufficient to summon a genius who could perform any tasks , from the most deli- cate one to the most tremendous . The feeble manifes- tation discovered by Faraday and Henry of what can be made a great force is called the ...
... lamp which was sufficient to summon a genius who could perform any tasks , from the most deli- cate one to the most tremendous . The feeble manifes- tation discovered by Faraday and Henry of what can be made a great force is called the ...
Pagina 49
... lamps is fine , and is of carbon . The narrowing of the electric conductor , therefore , leads to a great development of heat and light ; and here we must bear in mind that the only difference between heat and light consists in wave ...
... lamps is fine , and is of carbon . The narrowing of the electric conductor , therefore , leads to a great development of heat and light ; and here we must bear in mind that the only difference between heat and light consists in wave ...
Pagina 52
... lamps when they are lighted than when they are not lighted . The heating of an electric conductor is proportional to the square of the strength of the current which is flow- ing ; that is , if the strength of the current is doubled ...
... lamps when they are lighted than when they are not lighted . The heating of an electric conductor is proportional to the square of the strength of the current which is flow- ing ; that is , if the strength of the current is doubled ...
Pagina 55
... lamp was obtained which would burn from three hundred to six hundred hours . To maintain a number of such lamps on ... lamp required the same amount of current to raise it under the given electric pressure to the same candle power . This ...
... lamp was obtained which would burn from three hundred to six hundred hours . To maintain a number of such lamps on ... lamp required the same amount of current to raise it under the given electric pressure to the same candle power . This ...
Pagina 56
... lamp , therefore , placed on any wire represented by a meridian would glow with the same brilliancy as that of its ... lamps would be enor- mously diminished by this arrangement , which is termed the multiple circuit . We can obtain a ...
... lamp , therefore , placed on any wire represented by a meridian would glow with the same brilliancy as that of its ... lamps would be enor- mously diminished by this arrangement , which is termed the multiple circuit . We can obtain a ...
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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.