Absolute Measurements in Electricity and MagnetismMacmillan and Company, 1889 - 384 sider |
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Resultat 1-5 av 29
Side 41
... Suppose we have two long , very thin , straight , steel bars , which are uniformly and longitudinally magnetized ; their poles may be taken as at their extremities ; in fact , the distribution of magnetism in them is such that the ...
... Suppose we have two long , very thin , straight , steel bars , which are uniformly and longitudinally magnetized ; their poles may be taken as at their extremities ; in fact , the distribution of magnetism in them is such that the ...
Side 45
... suppose round every mesh an indepen- dent current to circulate of the same strength and in the same direction as the current in the circuit . Each mesh may be taken so small that it may be regarded as plane , and it is therefore ...
... suppose round every mesh an indepen- dent current to circulate of the same strength and in the same direction as the current in the circuit . Each mesh may be taken so small that it may be regarded as plane , and it is therefore ...
Side 47
... suppose the magnetic system to consist of a single magnetic pole , and put r for the distance of the pole from the element , and μ for the strength of the pole , I becomes μ / r2 , and we have d F Cu.ds. sin / r2 . = Considering now the ...
... suppose the magnetic system to consist of a single magnetic pole , and put r for the distance of the pole from the element , and μ for the strength of the pole , I becomes μ / r2 , and we have d F Cu.ds. sin / r2 . = Considering now the ...
Side 49
... suppose that each pole of the magnet is at the same distance from all the elements of the wire . A current flowing in the wire acts , by Ampère's theory , with a force on one pole of the needle towards one side of the plane of the ...
... suppose that each pole of the magnet is at the same distance from all the elements of the wire . A current flowing in the wire acts , by Ampère's theory , with a force on one pole of the needle towards one side of the plane of the ...
Side 50
... suppose that the actual current flowing across a unit of area is every- where the same . Hence if C be the current strength in each turn , and n the number of turns in unit area , we have for the current crossing the area A of an ...
... suppose that the actual current flowing across a unit of area is every- where the same . Hence if C be the current strength in each turn , and n the number of turns in unit area , we have for the current crossing the area A of an ...
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amperes angles arrangement balance battery brass C.G.S. units C₂ cell centimetres centre coil comparison condenser conductor connected constant convenient copper cross-sections current flowing current strength deflection denote density described determined difference of potential dimensional formula distance E₁ electrical efficiency Electricity and Magnetism electrodes electromagnetic electromotive force electrostatic equal equation fixed give given graduated grammes Hence horizontal induction instrument insulated joined in series kathode Lord Rayleigh machine magnetic field means ment method motor movable ring n² L² nearly needle numerical obtained Ohm's law ohms piece placed plane plate points pole position potential galvanometer practical unit quantity of electricity r₁ R₂ ratio rheostat round scale screws self-induction shown in Fig Sir William Thomson slider sliding standard surface temperature terminals thick turned unit of length V₁ V₂ velocity vertical voltmeter volts vulcanite wattmeter weight Wheatstone's Bridge wire wire coils zero
Populære avsnitt
Side 385 - With the Mathematical Elements of Music. Designed for the Use of Students in the University. Second Edition, revised and enlarged. Crown 8vo. gs. A TREATISE ON MAGNETISM. Designed for the Use of Students in the University.