What is Electricity?D. Appleton and Company, 1903 - 315 pagini |
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Pagina 22
... lines of force showed electrical disturbances . Such a coil , however , did not give any indications , no matter how it was moved in ref- erence to the lines of force , of gravitation . The needle of a delicate galvanometer remained ...
... lines of force showed electrical disturbances . Such a coil , however , did not give any indications , no matter how it was moved in ref- erence to the lines of force , of gravitation . The needle of a delicate galvanometer remained ...
Pagina 38
... lines of force , although they were familiar with the arrangement of iron filings around the poles of a magnet . The defenders of the theory of action at a dis- tance did not carefully examine the disturbance of a mag- netic field by ...
... lines of force , although they were familiar with the arrangement of iron filings around the poles of a magnet . The defenders of the theory of action at a dis- tance did not carefully examine the disturbance of a mag- netic field by ...
Pagina 39
... lines of force in the space occupied by the iron . To obtain a space any- where on the earth's surface free from lines of force we must employ a thick - walled hollow sphere of iron . In the space inside the sphere there will be no ...
... lines of force in the space occupied by the iron . To obtain a space any- where on the earth's surface free from lines of force we must employ a thick - walled hollow sphere of iron . In the space inside the sphere there will be no ...
Pagina 41
... lines of force and pressure in all directions at right angles to the lines of force , the tension and the pressure being equal in numerical value and proportional to the square of the intensity of the field at the given point , the ...
... lines of force and pressure in all directions at right angles to the lines of force , the tension and the pressure being equal in numerical value and proportional to the square of the intensity of the field at the given point , the ...
Pagina 42
... lines of force , combined with a tension in all directions at right angles to the lines of force . Such a stress would no doubt account for the observed effects of gravita- tion . " A B FIG . 4 . Prof. C. A. Bjerknes , * in a very ...
... lines of force , combined with a tension in all directions at right angles to the lines of force . Such a stress would no doubt account for the observed effects of gravita- tion . " A B FIG . 4 . Prof. C. A. Bjerknes , * in a very ...
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Termeni și expresii frecvente
action alternating current apparatus attraction bodies 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 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 tric tricity tube velocity vibrations voltaic cell zinc
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Pagina 199 - Electrical matter differs from common matter in this, that the parts of the latter mutually attract, those of the former mutually repel each other.