What is Electricity?D. Appleton & Company, 1896 - 315 pagini |
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Pagina 36
... iron ( N S , Fig . 3 ) on the end of a balance arm . The other end of the arm vibrated be- tween two stops . It was claimed that when the proper rate of vibration was reached the armature would move across the neutral line to and fro ...
... iron ( N S , Fig . 3 ) on the end of a balance arm . The other end of the arm vibrated be- tween two stops . It was claimed that when the proper rate of vibration was reached the armature would move across the neutral line to and fro ...
Pagina 37
... iron ships has made it necessary to compensate the attraction of the vessel upon the compasses by placing steel magnets in proper positions on the deck near the compass , or by placing a compass high above the deck , and by means of its ...
... iron ships has made it necessary to compensate the attraction of the vessel upon the compasses by placing steel magnets in proper positions on the deck near the compass , or by placing a compass high above the deck , and by means of its ...
Pagina 38
... iron the attraction between them would be expressed by F- m m , in which μ is a quantity which = μ " depends upon the medium . If μ is large , the force of attraction is small . The attraction , for instance , be- tween two magnets ...
... iron the attraction between them would be expressed by F- m m , in which μ is a quantity which = μ " depends upon the medium . If μ is large , the force of attraction is small . The attraction , for instance , be- tween two magnets ...
Pagina 39
... iron article in the room they tend to crowd through the iron , finding it a better conductor than the air . We say , therefore , that there is a flow of magnetic induction through the iron . We can think of magnetic induction as the ...
... iron article in the room they tend to crowd through the iron , finding it a better conductor than the air . We say , therefore , that there is a flow of magnetic induction through the iron . We can think of magnetic induction as the ...
Pagina 41
... Iron and steel , nickel and cobalt , are paramagnetic bodies . Bismuth is an example of a diamagnetic body . A bar of bismuth will place itself at right angles to the line between a north and a south pole , instead of in this line , as ...
... Iron and steel , nickel and cobalt , are paramagnetic bodies . Bismuth is an example of a diamagnetic body . A bar of bismuth will place itself at right angles to the line between a north and a south pole , instead of in this line , as ...
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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.