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Lab 1

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der<br />

1<br />

Z = 1 Z 1<br />

+ 1 Z 2<br />

. (22)<br />

Dette er altså uttrykket for impedansen til en parallellkobling. På tilsvarende<br />

måte kan vi vise uttrykket<br />

Z = Z 1 + Z 2 (23)<br />

for en seriekobling. Man bruker da at strømmen er den samme igjennom de to<br />

impedansene.<br />

10

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