What is Electricity?D. Appleton and Company, 1903 - 315 pagini |
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Pagina 9
... space is filled with a me- dium which transmits electro - magnetic waves to us from the sun . In Tyndall's Heat as a Mode of Motion , Tait's Re- cent Advances in Physical Science , and Stewart's Con- servation of Energy , the relations ...
... space is filled with a me- dium which transmits electro - magnetic waves to us from the sun . In Tyndall's Heat as a Mode of Motion , Tait's Re- cent Advances in Physical Science , and Stewart's Con- servation of Energy , the relations ...
Pagina 11
... space . The sun is the source of electro - magnetic waves , and the earth is the scene of transformations of electric energy . A piece of coal burning in a grate has therefore a long electro - magnetic history . It owed its origin to ...
... space . The sun is the source of electro - magnetic waves , and the earth is the scene of transformations of electric energy . A piece of coal burning in a grate has therefore a long electro - magnetic history . It owed its origin to ...
Pagina 11
... an absolute system of elec- trical measurements absolute in the sense that every- thing is referred to acceleration of a body falling to the earth at a definite place through a certain space in 11 -MEASUREMENTS IN ELECTRICITY.
... an absolute system of elec- trical measurements absolute in the sense that every- thing is referred to acceleration of a body falling to the earth at a definite place through a certain space in 11 -MEASUREMENTS IN ELECTRICITY.
Pagina 12
John Trowbridge. earth at a definite place through a certain space in a definite time . Absolute also in the sense that we do not deal with merely ratios . We measure the efficiency of a dynamo which is producing the currents of ...
John Trowbridge. earth at a definite place through a certain space in a definite time . Absolute also in the sense that we do not deal with merely ratios . We measure the efficiency of a dynamo which is producing the currents of ...
Pagina 15
... space . A move- ment of of an inch could thus be detected in the motion of the attracting masses . An idea of the amount of the attraction between small bodies can also be gained from a recent investigation of Prof. C. V. Boys , who ...
... space . A move- ment of of an inch could thus be detected in the motion of the attracting masses . An idea of the amount of the attraction between small bodies can also be gained from a recent investigation of Prof. C. V. Boys , who ...
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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.