What is Electricity?D. Appleton and Company, 1903 - 315 страници |
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Страница 37
... charges on the pith balls and r is the distance between them . When there is a plate of glass between the charged balls the force is very much diminished . If k is a factor depending on the insulating power of the glass , the force is F ...
... charges on the pith balls and r is the distance between them . When there is a plate of glass between the charged balls the force is very much diminished . If k is a factor depending on the insulating power of the glass , the force is F ...
Страница 66
... charge of electricity in the atmos- phere . " He had noticed that the prepared frog's legs , bound up with brass hooks on an iron railing , showed the same contractions not only in the case of thunderstorms , but also under a clear sky ...
... charge of electricity in the atmos- phere . " He had noticed that the prepared frog's legs , bound up with brass hooks on an iron railing , showed the same contractions not only in the case of thunderstorms , but also under a clear sky ...
Страница 70
... 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 body charged ...
... 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 body charged ...
Страница 74
... charged by an electric current , are connected by an external wire , a strong current rushes from the oxygenated lead strip to the hydrogen- ated strip . By increasing the surface of such strips we can charge such a storage battery to ...
... charged by an electric current , are connected by an external wire , a strong current rushes from the oxygenated lead strip to the hydrogen- ated strip . By increasing the surface of such strips we can charge such a storage battery to ...
Страница 75
... charged by a dynamo machine sparks can be obtained , and a severe electric shock is felt when the positive and negative terminals of the battery are seized by the hands . The battery imitates in all respects the action of Frank- lin's ...
... charged by a dynamo machine sparks can be obtained , and a severe electric shock is felt when the positive and negative terminals of the battery are seized by the hands . The battery imitates in all respects the action of Frank- lin's ...
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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.