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Engineering LibreTexts

10.1: Theory Overview

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  • Many complex R, L, C networks may be analyzed by reducing them to simpler series or parallel circuits, perhaps through an iterative process in more involved instances. In this analysis each series or parallel element is in fact a complex impedance made up of a series or parallel combination of other components and thus producing a phase angle between +90 and -90 degrees. Consequently, the simple “all right angles” phasor diagrams found for basic series and parallel circuits may be replaced with more general phasor diagrams with non-right angles. In spite of this, both Kirchhoff’s current law and Kirchhoff’s voltage law must still be satisfied for the entire circuit, as well as any sub-circuits or branches.

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