Download e-book for kindle: Dielectrics and Waves by Arthur R. von Hippel

By Arthur R. von Hippel

ISBN-10: 1580531229

ISBN-13: 9781580531221

Reissued to commemorate the fortieth anniversary of the unique booklet of "Dielectrics and Waves". A accomplished insurance of an issue that crosses the fields of chemistry, physics and engineering and may be precious to someone with an curiosity in dielectric engineering.

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5,27) zunächst die Angabe , = _1-I-ff(-;;r*)+(r~,rQ) dS [4 n x I r~13 a CP2 (1530) . 5,22) in der Tat folgt. 5,31 ) 32 Kapitel 1. 5,2) von 0* aus zu messen. 5,15) dargestellt. ,. Mzz der Matrix _I 47tx IIXt? adS 4~ x (s) I ~x 4 II II YQ XQ a dS ~x XQ YQ a dS 4 47tx a dS 4 (s) ~x II ZQ II II XQ ZQ a dS ) YQ ZQ a (s) a dS 4 (s) ZQ XQ ~x (s) -1--IIyt? 5,33) zu entnehmen sind. 5,34) so erweist sich

5,41) ihren gemeinsamen Durchgangsstrom. 5,43) annimmt: Das Strömungsfeld der in sich abgeschlossenen Erdersysteme reduziert sich im Fernbereich auf das eines Dipoles, dessen Momentenvektor m als Produkt des Durchgangsstromes I = 2 I mit dem von der Senke 0;1 zur Quelle 0; weisenden Verrückungsvektor gegeben ist. 1 Der Halbkugelerder a) Häufig besitzt der Erder angenähert die Gestalt einer nach Abb. 1,1 unmittelbar an der ebenen Erdoberfläche befindlichen Halbkugel vom Radius r o, der von aussen der Strom I zugeführt wird.

1,8) konvergiert. 3,7). 1,9) der also von der Leitfähigkeit des Bodens unabhängig ist! 3,8) angegebenen Wert I Kr des lebensgefährlichen Stromes finden wir aus .!. d I I g I 7t T~ + S TO S = I I Kr - ~ Am I- 20 p. 1 Der Halbkugelerder als absoluten Wert des Gefahrstromes 11 7t 1r~+sro 11 g 1 -11 Kr S d Unter den Annahmen s = 1 m, d der relativ schwache Strom = 7t 20 r~+sro A sd mp. 1,11) 1,5 m wird schon 2,96 Amp. lebensgefährlich! 1,12) 2 rF 27t" r 7t s: r so dass erst im Abstand rg = 111 auf fläche Y I -sd= 2 y40 -1 -lllsd 11Kr 1abgesunken Bg = 7t kr 7t ist.

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Dielectrics and Waves by Arthur R. von Hippel


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