What is Electricity?D. Appleton and Company, 1903 - 315 pagini |
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Pagina 40
... battery . It has a magneto - motive force . It has a circuit with a certain resistance . It has a flow analogous to a current . Although this terminology shows that we are study- ing the action from point to point in the substance of a ...
... battery . It has a magneto - motive force . It has a circuit with a certain resistance . It has a flow analogous to a current . Although this terminology shows that we are study- ing the action from point to point in the substance of a ...
Pagina 57
... battery to the ground . Indeed , in cer- tain cases a great deal is saved , for the energy of the current is not dissipated into heat along a return wire . We have said that a magnet or compass needle instant- ly points to a wire ...
... battery to the ground . Indeed , in cer- tain cases a great deal is saved , for the energy of the current is not dissipated into heat along a return wire . We have said that a magnet or compass needle instant- ly points to a wire ...
Pagina 58
... battery , and from the power house or battery to the earth plate at the other end of the wire circuit . If placed on the earth between these earth plates and sufficiently far from the overhead wire on the ground , for instance , beneath ...
... battery , and from the power house or battery to the earth plate at the other end of the wire circuit . If placed on the earth between these earth plates and sufficiently far from the overhead wire on the ground , for instance , beneath ...
Pagina 59
... battery such as is used on bell wires or for medical purposes . If we should hold a telephone to the ear and connect one of its lead- ing wires to the rail of an ordinary electric road and the other to the iron posts which run beside ...
... battery such as is used on bell wires or for medical purposes . If we should hold a telephone to the ear and connect one of its lead- ing wires to the rail of an ordinary electric road and the other to the iron posts which run beside ...
Pagina 60
... battery . Perhaps the best illustration of the manner in which the electric current spreads out in the earth is afforded by a method of telegraphing without wires , which I described in the Proceedings of the American Academy of Arts ...
... battery . Perhaps the best illustration of the manner in which the electric current spreads out in the earth is afforded by a method of telegraphing without wires , which I described in the Proceedings of the American Academy of Arts ...
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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 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.