What is Electricity?D. Appleton & Company, 1896 - 315 pagini |
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Pagina 21
... cause of gravitation is not to be found in these three hypotheses . ' 99 It is interesting to follow the working of Faraday's mind on the subject of gravitation . Having opened a great field in the transformations of electricity into ...
... cause of gravitation is not to be found in these three hypotheses . ' 99 It is interesting to follow the working of Faraday's mind on the subject of gravitation . Having opened a great field in the transformations of electricity into ...
Pagina 28
... caused more than four gallons of water to boil without fire - merely by the heat generated by the friction of two metals rubbed against each other . I have just finished a calculation by which it appears that the heat generated equably ...
... caused more than four gallons of water to boil without fire - merely by the heat generated by the friction of two metals rubbed against each other . I have just finished a calculation by which it appears that the heat generated equably ...
Pagina 34
... caused a reduction of the magnetic moments of a bar magnet by about 40 per cent , and that the magnet on cooling recovered its original state . This result would lead us to expect that if the same law is followed below the melting point ...
... caused a reduction of the magnetic moments of a bar magnet by about 40 per cent , and that the magnet on cooling recovered its original state . This result would lead us to expect that if the same law is followed below the melting point ...
Pagina 36
... had moved through a neutral line . The phe- nomenon , however , was caused by the shifting of the consequent poles , due to the changing intensity of the field , and had no real existence . It is 36 WHAT IS ELECTRICITY ?
... had moved through a neutral line . The phe- nomenon , however , was caused by the shifting of the consequent poles , due to the changing intensity of the field , and had no real existence . It is 36 WHAT IS ELECTRICITY ?
Pagina 37
... 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 was pivoted so that its ...
... 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 was pivoted so that its ...
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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.