Lenz e mil (1 résultats)
Langue : allemand
Edité par Leipzig Barth, 1835
- Couverture rigide
Vendeur : Antiquariat Gerhard Gruber, Heilbronn, AllemagneAntiquariat Gerhard Gruber
Contacter le vendeurVendeur avec une évaluation de 4 étoilesEtat: Occasion
EUR 209,00
EUR 40,00 expéditionExpédition depuis Allemagne vers Etats-UnisQuantité disponible : 1 disponible(s)
Ajouter au panier(20 x 12,5 cm). (2) VIII, 672 (8) S. Mit 6 gefalteten Kupfertafeln. Pappband der Zeit. Zu I: Wiederabdruck der 1832 vor der Petersburger Akademie gelesenen Arbeit. - "Lenz worked out the theoretical and practical aspects of the ballistic method of measuring electrical and magnetic quantities (1832) on the basis of his conception… of the instantaneous, impactlike effect of induction current. Employing this method, he was able to make the first quantitative investigation of the induction phenomena themselves. (He established that the induced electromotive force in a coil is the sum of the electromotive force in each turn and does not depend upon the diameter of the turns, the thickness of the wire, or the metal of which it is made). He also made a quantitative comparison of the resistivity of wire of different metals, established the laws of temperature dependence of resistivity in quadratic form for eight metals, derived the squarelaw variation of the attractive force of electromagnets with the magnetization current (under the conditions of the experiment, the magnetic field was proportional to the magnetic induction), and plotted curves showing the intensity distribution of magnetization along an iron core of a coil of finite length" (DSB). - Stempel auf Titel. Stellenweise gering gebräunt. Einband leicht bestoßen, sonst gut erhalten. - DSB 8, 187. - Der Band enthält weiter Arbeiten von Breithaupt, Merian, Bunsen, Rose, Faraday, Lenz, Wheatstone, Quenstaedt etc. und von W. Weber: Ueber die Elasticität der Seidenfäden. - Darmstaedter S. 419.
