What is Electricity?D. Appleton & Company, 1896 - 315 pagini |
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Pagina 22
... glass or wood was allowed to fall along the lines of gravitation and was immediately drawn up against the force of gravitation . It is evident that his fruitful con- ception of space filled with lines of magnetic and elec- tric force ...
... glass or wood was allowed to fall along the lines of gravitation and was immediately drawn up against the force of gravitation . It is evident that his fruitful con- ception of space filled with lines of magnetic and elec- tric force ...
Pagina 23
... 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 was sudden or gradual ...
... 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 was sudden or gradual ...
Pagina 37
... glass between the charged balls the force is very much diminished . If k is a factor depending on the insulating power of the glass , the force is F - 3 = m m К 202 ; that is , the greater the insulating power the smaller the force . In ...
... glass between the charged balls the force is very much diminished . If k is a factor depending on the insulating power of the glass , the force is F - 3 = m m К 202 ; that is , the greater the insulating power the smaller the force . In ...
Pagina 62
... glass an excellent one . There are several terms now in common use in elec- trical science which serve as measures of value , and I shall endeavour to give a popular explanation of them . The term ampère is used to denote the strength ...
... glass an excellent one . There are several terms now in common use in elec- trical science which serve as measures of value , and I shall endeavour to give a popular explanation of them . The term ampère is used to denote the strength ...
Pagina 64
... glass globe and its rubbers , and its ponderous wheel for turn- ing the globe against the rubbers , ordered by Benjamin Franklin for the College at Cambridge ; there is a vol- taic battery consisting of a great many zinc plates and ...
... glass globe and its rubbers , and its ponderous wheel for turn- ing the globe against the rubbers , ordered by Benjamin Franklin for the College at Cambridge ; there is a vol- taic battery consisting of a great many zinc plates and ...
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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.