What is Electricity?D. Appleton and Company, 1903 - 315 pagini |
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Pagina 12
... attraction of gravitation . Our ultimate appeal , therefore , on the subject of the transformation of energy upon which we are entering is to gravitation , and it will be interesting at the opening stage of our study of electro ...
... attraction of gravitation . Our ultimate appeal , therefore , on the subject of the transformation of energy upon which we are entering is to gravitation , and it will be interesting at the opening stage of our study of electro ...
Pagina 13
... attraction between two small bodies , such as two cannon balls , is extremely difficult to detect and to measure . The direct determination of the attraction between two masses by means of the com- mon balance is the simplest way of ...
... attraction between two small bodies , such as two cannon balls , is extremely difficult to detect and to measure . The direct determination of the attraction between two masses by means of the com- mon balance is the simplest way of ...
Pagina 14
... attracted by a mass of 154 kilogrammes of lead , showed an apparent increase of about 0.01 milligramme . We perceive from this how small the force is which is to be measured , and in order to determine it with accuracy Prof. Poynting ...
... attracted by a mass of 154 kilogrammes of lead , showed an apparent increase of about 0.01 milligramme . We perceive from this how small the force is which is to be measured , and in order to determine it with accuracy Prof. Poynting ...
Pagina 15
... attraction between bodies of small magnitude requires for its detection apparatus of extreme delicacy , yet when one of the attracting bodies is large , like the earth , the force of attraction between it and even minute bodies becomes ...
... attraction between bodies of small magnitude requires for its detection apparatus of extreme delicacy , yet when one of the attracting bodies is large , like the earth , the force of attraction between it and even minute bodies becomes ...
Pagina 16
... attracted by gravitation and descends . In this way are formed what are called convection currents in water or in our atmosphere . The force of gravitation tends to equalize the movements produced by heat . In the case of an ascending ...
... attracted by gravitation and descends . In this way are formed what are called convection currents in water or in our atmosphere . The force of gravitation tends to equalize the movements produced by heat . In the case of an ascending ...
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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 262 - 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...
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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.