Di Londra, Edimburgo e Dublino rivista filosofico e ufficiale della scienza . Il filo costante, wastwisted e la corrente indotta nel circuito secondario a causadel magnetizzazione longitudinale in tal modo wasmeasured sviluppate mediante il metodo balistico. Come si vedrà dalla curva (fig. 15, p. 66), il longitudinalmagnetization sviluppato dalla torsione di una circolarmente filo magnetizediron raggiunge un massimo quando la media campo circolare isabout 10. Esso poi diminuisce, ma nonostante la costante streamof acqua, il riscaldamento dovuto alla corrente elettrica impedito theexperiment venga spinto verso il punto di interesse

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The London, Edinburgh and Dublin philosophical magazine and journal of science . the wire constant, it wastwisted and the induced current in the secondary circuit dueto the longitudinal magnetization thereby developed wasmeasured by the ballistic method. As will be seen from the curve (fig. 15, p. 66), the longitudinalmagnetization developed by twisting a circularly magnetizediron wire attains a maximum when the mean circular field isabout 10. It then decreases, but in spite of the constant streamof water, the heating due to electric current prevented theexperiment from being pushed to the point where the directionof the current is reversed. To judge from the course of thocurve, the tendency is such that there is a reversal. In nickel Phil. Mag. S. 6. Vol. 4. No. 19. July 1902. F 66 Prof. Nagaoka and K. Honda on Magnetostriction the direction of the induced current is opposite to that in iron, and the total quantity of the current attains a maximum, whence it continually diminishes, but not to such an extentthat the current ultimately changes its direction. Fig. 15.. These experiments show that the twist produced by thecombined action of the longitudinal and circular magneti-zations, the circular magnetization produced by twisting alongitudinally magnetized wire, and the longitudinal mag-netization caused by twisting a circularly magnetized wire, are characterized by having various peculiarities, which arecommon to all of them. This cannot be a mere chancecoincidence; we shall have to ascribe these allied phenomenato the same common cause. In these experiments we were assisted by Mr. S. Shimizu, a post-graduate in physics, to whom our best thanks are due. (d) Application of Kirchhoffs Theory to Wiedemann Effect. In our last paper on magnetostriction, we noticed thatKirchhoffs theory can be extended to the study of the relationbetween torsion and magnetization, exactly in the samemanner as was done by Maxwell and Chrystal to explain theWiedemann effect. There we found th

Parole chiave associate all'immagine

• bookcentury1800
• bookdecade1840
• booksubjectscience
• bookyear1840