What is Electricity?D. Appleton & Company, 1896 - 315 pagini |
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Pagina 15
... move- ment of the mirror was observed by a telescope placed at a distance . The movement of the mirror , it is evi- dent , sweeps a beam of light through space . A move- ment of of an inch could thus be detected in the motion of the ...
... move- ment of the mirror was observed by a telescope placed at a distance . The movement of the mirror , it is evi- dent , sweeps a beam of light through space . A move- ment of of an inch could thus be detected in the motion of the ...
Pagina 30
... move- ment and the electrical energy produced , we entered upon the new era of electricity - an era which is charac- terized by our study of the transformations of energy . In the subject of electricity delicate measuring in- struments ...
... move- ment and the electrical energy produced , we entered upon the new era of electricity - an era which is charac- terized by our study of the transformations of energy . In the subject of electricity delicate measuring in- struments ...
Pagina 36
... move across the neutral line to and fro , the neutral line acting as a species of cut - off . The existence of the neutral line was shown by presenting small tacks to a bar of iron which was moved in front of the poles of the magnet ...
... move across the neutral line to and fro , the neutral line acting as a species of cut - off . The existence of the neutral line was shown by presenting small tacks to a bar of iron which was moved in front of the poles of the magnet ...
Pagina 43
... move- ments could be communicated to these fluids . When two pulsators are brought near each other and when the pulsations are in the same phase there is an at- traction ( Fig . 5 ) . On the other hand , if the pulsations occurs . N N ...
... move- ments could be communicated to these fluids . When two pulsators are brought near each other and when the pulsations are in the same phase there is an at- traction ( Fig . 5 ) . On the other hand , if the pulsations occurs . N N ...
Pagina 66
... move- ments of the muscles of the frog's legs . He continues thus : " After I had investigated the effects of atmospheric electricity my heart burned with desire to test the power of the daily quiet charge of electricity in the atmos ...
... move- ments of the muscles of the frog's legs . He continues thus : " After I had investigated the effects of atmospheric electricity my heart burned with desire to test the power of the daily quiet charge of electricity in the atmos ...
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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.