Question

The real parts of the driving point function Z (s) and Y (s) are?

(a) positive and zero

(b) positive

(c) zero

(d) positive or zero

I got this question at a job interview.

I want to ask this question from Hurwitz Polynomials in portion Elements of Realizability and Synthesis of One-Port Networks of Network Theory

Answer 1

The correct answer is (d) positive or zero

To elaborate: The real parts of the driving point impedance function Z (s) and driving point admittance function Y (s) are positive or zero.