What is Electricity?D. Appleton and Company, 1903 - 315 страници |
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Страница 11
... lamp which was sufficient to summon a genius who could perform any tasks , from the most deli- cate one to the most tremendous . The feeble manifes- tation discovered by Faraday and Henry of what can be made a great force is called the ...
... lamp which was sufficient to summon a genius who could perform any tasks , from the most deli- cate one to the most tremendous . The feeble manifes- tation discovered by Faraday and Henry of what can be made a great force is called the ...
Страница 49
... lamps is fine , and is of carbon . The narrowing of the electric conductor , therefore , leads to a great development of heat and light ; and here we must bear in mind that the only difference between heat and light consists in wave ...
... lamps is fine , and is of carbon . The narrowing of the electric conductor , therefore , leads to a great development of heat and light ; and here we must bear in mind that the only difference between heat and light consists in wave ...
Страница 52
... lamps when they are lighted than when they are not lighted . The heating of an electric conductor is proportional to the square of the strength of the current which is flow- ing ; that is , if the strength of the current is doubled ...
... lamps when they are lighted than when they are not lighted . The heating of an electric conductor is proportional to the square of the strength of the current which is flow- ing ; that is , if the strength of the current is doubled ...
Страница 55
... lamp was obtained which would burn from three hundred to six hundred hours . To maintain a number of such lamps on ... lamp required the same amount of current to raise it under the given electric pressure to the same candle power . This ...
... lamp was obtained which would burn from three hundred to six hundred hours . To maintain a number of such lamps on ... lamp required the same amount of current to raise it under the given electric pressure to the same candle power . This ...
Страница 56
... lamp , therefore , placed on any wire represented by a meridian would glow with the same brilliancy as that of its ... lamps would be enor- mously diminished by this arrangement , which is termed the multiple circuit . We can obtain a ...
... lamp , therefore , placed on any wire represented by a meridian would glow with the same brilliancy as that of its ... lamps would be enor- mously diminished by this arrangement , which is termed the multiple circuit . We can obtain a ...
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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.