What is Electricity?D. Appleton and Company, 1903 - 315 pagini |
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Pagina 23
... negative . They do not shake my strong feelings of the existence of a relation between gravity and electricity , though they give no proof that such a relation exists . " We shall now enter upon the study of the mysteries MEASUREMENTS ...
... negative . They do not shake my strong feelings of the existence of a relation between gravity and electricity , though they give no proof that such a relation exists . " We shall now enter upon the study of the mysteries MEASUREMENTS ...
Pagina 32
... negative state , at least relatively to its natural quantity ; neither can it be introduced so as to put the iron into a positive state or render it plus . In this respect , therefore , magnetism differs from elec- tricity . " 4. A ...
... negative state , at least relatively to its natural quantity ; neither can it be introduced so as to put the iron into a positive state or render it plus . In this respect , therefore , magnetism differs from elec- tricity . " 4. A ...
Pagina 42
... negative . We must therefore assume a differ- ent kind of stress . " We must suppose that there is a pressure in the direction of the lines of force , combined with a tension in all directions at right angles to the lines of force ...
... negative . We must therefore assume a differ- ent kind of stress . " We must suppose that there is a pressure in the direction of the lines of force , combined with a tension in all directions at right angles to the lines of force ...
Pagina 69
... negative . It can be said , in general , that an electrical current is generated whenever two dissimilar metals connected by a wire are immersed in a liquid which is capable of con- ducting electricity . For instance , if the handles of ...
... negative . It can be said , in general , that an electrical current is generated whenever two dissimilar metals connected by a wire are immersed in a liquid which is capable of con- ducting electricity . For instance , if the handles of ...
Pagina 70
... negative charge of electricity upon the iron spoon , and a positive charge upon the silver spoon . By the use of a great number of zinc and copper plates separated by paper moistened with salt and water , Volta was able to show that a ...
... negative charge of electricity upon the iron spoon , and a positive charge upon the silver spoon . By the use of a great number of zinc and copper plates separated by paper moistened with salt and water , Volta was able to show that a ...
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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.