What is Electricity?D. Appleton and Company, 1903 - 315 pagini |
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Pagina 11
... action of coal - tar dyes in modern pho- tography . Thus the original action of electro - magnetic waves shown in complex growths of vegetation , buried in the earth for ages , becomes evident again in a grand series of transformations ...
... action of coal - tar dyes in modern pho- tography . Thus the original action of electro - magnetic waves shown in complex growths of vegetation , buried in the earth for ages , becomes evident again in a grand series of transformations ...
Pagina 11
... action by any one who possessed a coil of wire and a magnet . The reason that it remained undiscovered so long was due to the difficulty of obtaining well - insulated copper wire , and to the want of a sufficiently sensitive instrument ...
... action by any one who possessed a coil of wire and a magnet . The reason that it remained undiscovered so long was due to the difficulty of obtaining well - insulated copper wire , and to the want of a sufficiently sensitive instrument ...
Pagina 12
... action upon the force of gravita- tion . Our standard for the measure of time depends upon the pendulum , and this in turn upon the time of rotation of the earth . It is true that we may depend upon a tuning fork for the estimation of ...
... action upon the force of gravita- tion . Our standard for the measure of time depends upon the pendulum , and this in turn upon the time of rotation of the earth . It is true that we may depend upon a tuning fork for the estimation of ...
Pagina 13
... action . The work we have to do to overcome the force of gravitation is our measure of it . When large masses are lifted against this force we become sensible of its potency . Yet the force of attraction between two small bodies , such ...
... action . The work we have to do to overcome the force of gravitation is our measure of it . When large masses are lifted against this force we become sensible of its potency . Yet the force of attraction between two small bodies , such ...
Pagina 32
... action of magnetism on light ; then we perceive that there are not only attractive forces between molecules of the iron , but also rotary motions in the medium within and around the magnet , and in order 32 WHAT IS ELECTRICITY ?
... action of magnetism on light ; then we perceive that there are not only attractive forces between molecules of the iron , but also rotary motions in the medium within and around the magnet , and in order 32 WHAT IS ELECTRICITY ?
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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.