What is Electricity?D. Appleton and Company, 1903 - 315 pagini |
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Pagina 14
... end to a fixed support , S , independent of the balance . The angle through which the mirror , M , turns for a given motion of the S M B FIG . 1 . pointer is inversely as the distance between it and the 14 WHAT IS ELECTRICITY ?
... end to a fixed support , S , independent of the balance . The angle through which the mirror , M , turns for a given motion of the S M B FIG . 1 . pointer is inversely as the distance between it and the 14 WHAT IS ELECTRICITY ?
Pagina 15
... distance the sensibility of the arrangement may be almost indefi- nitely increased . " In Prof. Poynting's experiments , taking 4 millimetres as the distance between the threads and supposing the bracket to be 600 millimetres below the ...
... distance the sensibility of the arrangement may be almost indefi- nitely increased . " In Prof. Poynting's experiments , taking 4 millimetres as the distance between the threads and supposing the bracket to be 600 millimetres below the ...
Pagina 20
John Trowbridge. tween any two bodies inversely as the square of the distance . If , however , one of the bodies were a gen- erator of the fluid and the other an absorber of it , the bodies would repel each other . " Maxwell , * in ...
John Trowbridge. tween any two bodies inversely as the square of the distance . If , however , one of the bodies were a gen- erator of the fluid and the other an absorber of it , the bodies would repel each other . " Maxwell , * in ...
Pagina 26
... distance of eight miles , to attend the lectures of Prof. John Winthrop , the first Professor of Physics at Harvard University , I was in- terested to ascertain how much he learned of the subject of electricity . In the college archives ...
... distance of eight miles , to attend the lectures of Prof. John Winthrop , the first Professor of Physics at Harvard University , I was in- terested to ascertain how much he learned of the subject of electricity . In the college archives ...
Pagina 35
... distance , without the intervention of any medium between the poles . We shall see that the great advances in our knowledge of electricity and magnet- ism have come from our study of the actions in the medium between two magnetic poles ...
... distance , without the intervention of any medium between the poles . We shall see that the great advances in our knowledge of electricity and magnet- ism have come from our study of the actions in the medium between two magnetic poles ...
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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.