What is Electricity?D. Appleton and Company, 1903 - 315 pagini |
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Pagina 14
... lead hung on one arm of a chemical balance by a wire , and attracted by a mass of 154 kilogrammes of lead , showed an apparent increase of about 0.01 milligramme . We perceive from this how small the force is which is to be measured ...
... lead hung on one arm of a chemical balance by a wire , and attracted by a mass of 154 kilogrammes of lead , showed an apparent increase of about 0.01 milligramme . We perceive from this how small the force is which is to be measured ...
Pagina 34
... lead us to expect that if the same law is followed below the melting point of ice as Ewing found above it , then a bar magnet cooled to -182 ° C. ought to gain in magnetic moment something like 30 to 50 per cent . The experiment of Prof ...
... lead us to expect that if the same law is followed below the melting point of ice as Ewing found above it , then a bar magnet cooled to -182 ° C. ought to gain in magnetic moment something like 30 to 50 per cent . The experiment of Prof ...
Pagina 49
... leads to a great development of heat and light ; and here we must bear in mind that the only difference between heat ... lead us far . There is an evidence of pressure in such pipes , and also on con- ductors carrying electric currents ...
... leads to a great development of heat and light ; and here we must bear in mind that the only difference between heat ... lead us far . There is an evidence of pressure in such pipes , and also on con- ductors carrying electric currents ...
Pagina 52
... leads to a great development of heat . These are ap- parently contradictory conclusions . The contradiction , however ... lead pencil . Such a wire opposes very little resistance per foot to the flow of the electric current which is used ...
... leads to a great development of heat . These are ap- parently contradictory conclusions . The contradiction , however ... lead pencil . Such a wire opposes very little resistance per foot to the flow of the electric current which is used ...
Pagina 55
... lead an electric current into these wires at the south pole of the earth and out at the north pole , the current would divide itself proportionately on the meri- dian wires . Each meridian wire would receive the same amount of current ...
... lead an electric current into these wires at the south pole of the earth and out at the north pole , the current would divide itself proportionately on the meri- dian wires . Each meridian wire would receive the same amount of current ...
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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 262 - 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...
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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.