Which of the following is NOT a necessary condition for a rational function Z(s) to be a driving point impedance of a passive network?

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Physics · Network Theory

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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Z(s) must have an equal number of poles and zeros

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Answer 1

The real part of Z(s) must be non-negative for all Re(s) ≥ 0

Answer 2

Poles on the jω-axis must be simple with real and positive residues

Answer 3

All poles and zeros must lie in the left-half s-plane or on the jω-axis

Answer 4

Z(s) must have an equal number of poles and zeros

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