Question

A driving point impedance with poles at ω = 0, ω = ∞ must have ___________ term in the denominator polynomial.

(a) s

(b) s+1

(c) s+2

(d) s+3

I have been asked this question in an online quiz.

I want to ask this question from Frequency Response of Reactive One-Ports topic in portion Elements of Realizability and Synthesis of One-Port Networks of Network Theory

Answer 1

Right choice is (a) s

Explanation: As there is a pole at ω = 0, (s-jω)=s. Poles are written in the denominator of Z(s). So there will be s term in the denominator polynomial in a driving point impedance function Z(s).