What is Electricity?D. Appleton & Company, 1896 - 315 pagini |
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Pagina
... ELECTRIC CURRENT 45 V. - FLOW OF ELECTRICITY IN THE EARTH 57 VI . THE VOLTAIC CELL 64 VII . THE GALVANOMETER 86 VIII . THE DYNAMO MACHINE 94 IX . - SOURCES OF ELECTRIC POWER X. - TRANSFORMATIONS OF ENERGY XI . - ALTERNATING CURRENTS XII ...
... ELECTRIC CURRENT 45 V. - FLOW OF ELECTRICITY IN THE EARTH 57 VI . THE VOLTAIC CELL 64 VII . THE GALVANOMETER 86 VIII . THE DYNAMO MACHINE 94 IX . - SOURCES OF ELECTRIC POWER X. - TRANSFORMATIONS OF ENERGY XI . - ALTERNATING CURRENTS XII ...
Pagina 44
... electrical con- ductors and magnets . Wave motions in the ether are supposed to take place around the atoms or molecules of bodies . These wave motions are handicapped ... ELECTRIC CURRENT . A DISTINGUISHED American 44 WHAT IS ELECTRICITY ?
... electrical con- ductors and magnets . Wave motions in the ether are supposed to take place around the atoms or molecules of bodies . These wave motions are handicapped ... ELECTRIC CURRENT . A DISTINGUISHED American 44 WHAT IS ELECTRICITY ?
Pagina 45
... placed upon an iron core . The rapid development of electrical science during the past thirty years is largely due to the facility with which a piece of iron can be wound with covered wire . Prof. Joseph 45 THE ELECTRIC CURRENT.
... placed upon an iron core . The rapid development of electrical science during the past thirty years is largely due to the facility with which a piece of iron can be wound with covered wire . Prof. Joseph 45 THE ELECTRIC CURRENT.
Pagina 46
... electric current constant , the stronger the magnet . Now , in considering this phenomenon we are led to the remarkable fact that a thin covering of silk or cotton can prevent the electric current , such as is used to pro- pel cars ...
... electric current constant , the stronger the magnet . Now , in considering this phenomenon we are led to the remarkable fact that a thin covering of silk or cotton can prevent the electric current , such as is used to pro- pel cars ...
Pagina 47
... current which propels the car from passing to the rails , and thus back to the power house . Another striking difference between what we call a steady electrical current in a wire and steam ... currents are going in THE ELECTRIC CURRENT . 47.
... current which propels the car from passing to the rails , and thus back to the power house . Another striking difference between what we call a steady electrical current in a wire and steam ... currents are going in THE ELECTRIC CURRENT . 47.
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Termeni și expresii frecvente
action alternating current apparatus attraction body 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 flow 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 tricity tube velocity vibrations voltaic cell zinc
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Pagina 314 - SOUND : a Series of Simple, Entertaining, and Inexpensive Experiments in the Phenomena of Sound, for the use of Students of every age.
Pagina 296 - ... of our planet, so far as we know it; and nitrogen is very far the predominant constituent of our atmosphere. If the earth is a detached bit whirled off the mass of the sun, as cosmogonists love to tell us, how comes it that in leaving the sun we cleaned him out so completely of his nitrogen and oxygen that not a trace of these gases remains behind to be discovered even by the sensitive vision of the spectroscope...
Pagina 256 - 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...
Pagina 313 - Part I. MECHANICS, HYDROSTATICS, and PNEUMATICS. Part II. HEAT. Part III. ELECTRICITY and MAGNETISM. Part IV.
Pagina 118 - Faraday, in his mind's eye, saw lines of force traversing all space where the mathematicians saw centres of force attracting at a distance : Faraday saw a medium where they saw nothing but distance : Faraday sought the seat of the phenomena in real actions going on in the medium, they were satisfied that they had found it in a power of action at a distance impressed on the electric fluids.