A Century of ElectricityMacmillan, 1887 - 229 páginas |
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Página 51
... circuit . It has been likened many times to the pressure of a " head " of water , by means of which it is forced through a system of pipes ; and in this case it is well known that the press- ure does not depend upon the quantity of ...
... circuit . It has been likened many times to the pressure of a " head " of water , by means of which it is forced through a system of pipes ; and in this case it is well known that the press- ure does not depend upon the quantity of ...
Página 52
... circuit quite as much as it does upon the electromotive force existing therein . Some of the earlier ex- periments pointed the way to an understanding of this question , but the hint was not taken 52 A CENTURY OF ELECTRICITY .
... circuit quite as much as it does upon the electromotive force existing therein . Some of the earlier ex- periments pointed the way to an understanding of this question , but the hint was not taken 52 A CENTURY OF ELECTRICITY .
Página 53
... circuit , its elec- tromotive force , and its resistance . At present it will be necessary and sufficient to call atten- tion in a general way to the principles involved . The primary cause of the flow of the current is the ...
... circuit , its elec- tromotive force , and its resistance . At present it will be necessary and sufficient to call atten- tion in a general way to the principles involved . The primary cause of the flow of the current is the ...
Página 54
... circuit , and that the resistance which it offers to the passage of the current is just as important in determining the current strength as that of any other part of the circuit . Increasing the size of the plates diminishes the ...
... circuit , and that the resistance which it offers to the passage of the current is just as important in determining the current strength as that of any other part of the circuit . Increasing the size of the plates diminishes the ...
Página 55
... circuit is broken , so that the energy of chemical change shall all be concerned in , or incident to , the production of the current . The first forms of battery , which were single - fluid batteries , failed to meet many of these ...
... circuit is broken , so that the energy of chemical change shall all be concerned in , or incident to , the production of the current . The first forms of battery , which were single - fluid batteries , failed to meet many of these ...
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Términos y frases comunes
already Ampère appear armature arranged attracted battery beatification cable carbon cell century chemical circuit coil conductor connected consists construction copper core Crown 8vo current of electricity CYRUS W dash Davy deflect device devised direction discovery disk duced duplex dynamo dynamo-electric dynamo-electric machine effect elec electric current electric light electric telegraph electricians electrified electro-magnet electromotive force energy exhibited experiment experimental extremely fact Faraday Faraday's field flow Franklin Galvani galvanometer gutta-percha heat important increased induction insulated invention inventors known lamp latter Leyden jar lines of force machine magnetic needle means ment metals method Morse motion motor nearly number of lines Oersted's operation passed periment poles possible present principle produced rapid receiving instrument resistance rotation Royal Society science of electricity scientific signals siphon recorder stopcock successful sulphuric acid telegraph tion trans transmission transmitted tricity vibration wheel wire zinc
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Página 46 - ... of an inch), a bright spark was produced, and more than half the volume of the charcoal became ignited to whiteness, and by withdrawing the points from each other a constant discharge took place through the heated air, in a space equal at least to four inches, producing a most brilliant ascending arch of light, broad and conical in form in the middle.
Página 22 - I never was before engaged in any study that so totally engrossed my attention and my time, as this has lately done ; for what with making experiments when I can be alone, and repeating them to my friends and acquaintance, who, from the novelty of the thing, come continually in crowds to see them, I have, during some months past, had little leisure for any thing else.
Página 47 - ... producing a most beautiful coruscation of purple light, the charcoal became intensely ignited, and some platina wire attached to it, fused with brilliant scintillations, and fell in large globules upon the plate of the pump. All the phenomena of chemical decomposition were produced with intense rapidity by this combination.
Página 25 - The electric fluid is attracted by points. We do not know whether this property is in lightning, but since they agree in all the particulars in which we can already compare them, is it not probable they agree likewise in this? Let the experiment be made.