Download e-book for kindle: Classical electrodynamics - Klassische Elektrodynamik by Wegner F.

By Wegner F.

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Extra info for Classical electrodynamics - Klassische Elektrodynamik

Sample text

14) has been applied. 20) 1 . 21) and div j2 (r) = 0, one obtains finally for the force d3 rd3 r j1 (r ) · j2 (r) ∇ Die auf den ersten Stromkreis wirkende Kraft erh¨alt man durch Austauschen von 1 und 2. Gleichzeitig kann man r und r austauschen. Man sieht dann, dass The force acting on circuit (1) is obtained by exchanging 1 and 2. Simultaneously, one can exchange r and r . 22) gilt. holds. Aufgabe Berechne die Kraft zwischen zwei von Str¨omen I1 und I2 durchlaufenen Dr¨ahten, die u¨ ber die L¨ange l parallel im Abstand r (r l) laufen.

Man sieht dann, dass The force acting on circuit (1) is obtained by exchanging 1 and 2. Simultaneously, one can exchange r and r . 22) gilt. holds. Aufgabe Berechne die Kraft zwischen zwei von Str¨omen I1 und I2 durchlaufenen Dr¨ahten, die u¨ ber die L¨ange l parallel im Abstand r (r l) laufen. Hieraus bestimmten K und W die Lichtgeschwindigkeit. Exercise Calculate the force between two wires of length l carrying currents I1 and I2 which run parallel in a distance r (r l). K and W measured this force in order to determine the velocity of light.

The field between two charges q and −q at r2 and r1 is equivalent to a line of electric dipoles dp = qdr from r = r1 to r = r2 . 12) and thus for the field E(r) = q r − r2 r − r1 . 14) dm = dl c lc zusammengesetzt zu denken. Ber¨ucksichtigen wir, . 12) ausser except at the point of the dipole, then it follows that am Ort des Dipols, so folgt, in dem wir q durch we may replace q by qm = NI f /(lc) in order to obtain qm = NI f /(lc) ersetzen, die magnetische Induktion the magnetic induction r − r2 r − r1 B(r) = qm .

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Classical electrodynamics - Klassische Elektrodynamik by Wegner F.


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