What is Electricity?D. Appleton and Company, 1903 - 315 страници |
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Страница 11
... pressure would be an unalterable standard of time , and that the wave length in vacuum of sodium light would form a standard of length independent of any change in the force of gravitation and in the di- mensions of the earth . Maxwell ...
... pressure would be an unalterable standard of time , and that the wave length in vacuum of sodium light would form a standard of length independent of any change in the force of gravitation and in the di- mensions of the earth . Maxwell ...
Страница 21
... pressure is least when the average energy of motion is greatest . The wave motion is greatest near the fork and the pressure there is least , and the suspended body is therefore urged toward the fork . Maxwell remarks that all the ...
... pressure is least when the average energy of motion is greatest . The wave motion is greatest near the fork and the pressure there is least , and the suspended body is therefore urged toward the fork . Maxwell remarks that all the ...
Страница 41
... 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 observed electrostatic ...
... 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 observed electrostatic ...
Страница 42
... pressure in the direction of the 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 ...
... pressure in the direction of the 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 ...
Страница 46
... pressure . Cut a copper wire carrying an electrical current , file the ends square , place a sheet of writing paper between the ends and press them together : the current which was transmitting thousands of horse power is stopped ; it ...
... pressure . Cut a copper wire carrying an electrical current , file the ends square , place a sheet of writing paper between the ends and press them together : the current which was transmitting thousands of horse power is stopped ; it ...
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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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Страница 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.