What is Electricity?D. Appleton & Company, 1896 - 315 pagini |
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Pagina 47
... pipes conveying air or steam at high pres- sure and our wire carrying an electrical current is in the heat which we can perceive on both the pipes and the wire . This analogy is a valuable one , which we must bear in mind as we ...
... pipes conveying air or steam at high pres- sure and our wire carrying an electrical current is in the heat which we can perceive on both the pipes and the wire . This analogy is a valuable one , which we must bear in mind as we ...
Pagina 48
... pipe would cause a fluctuation in the trans- mission of power . The pressure of compressed air or steam is not sensibly ... pipes conveying it to the engines ; it does , however , affect the electric current which is light- ing the ...
... pipe would cause a fluctuation in the trans- mission of power . The pressure of compressed air or steam is not sensibly ... pipes conveying it to the engines ; it does , however , affect the electric current which is light- ing the ...
Pagina 49
... pipes conveying horse power by means of steam or compressed air and wires carrying electricity , we have seen , do not lead us far . There is an evidence of pressure in such pipes , and also on con- ductors carrying electric currents ...
... pipes conveying horse power by means of steam or compressed air and wires carrying electricity , we have seen , do not lead us far . There is an evidence of pressure in such pipes , and also on con- ductors carrying electric currents ...
Pagina 50
... pipes . Its effect on a magnet is the same whether the steam flows through it or not ; it acts in both cases like a ... pipes and gas pipes were constructed of brass , and no iron nails were used in the flooring . This con- struction was ...
... pipes . Its effect on a magnet is the same whether the steam flows through it or not ; it acts in both cases like a ... pipes and gas pipes were constructed of brass , and no iron nails were used in the flooring . This con- struction was ...
Pagina 56
... pipes . If we narrow the diameter of a pipe we increase the resistance to the flow of water ; if , however , we should undertake to carry water from one pole of the earth to the other pole by means of pipes , we could accomplish this ...
... pipes . If we narrow the diameter of a pipe we increase the resistance to the flow of water ; if , however , we should undertake to carry water from one pole of the earth to the other pole by means of pipes , we could accomplish this ...
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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.