Question

Consider the impedance function Z(s)=3(s+2)(s+4)/(s+1)(s+3). Find the value of R∞ after realizing by first Foster method.

(a) 1

(b) 2

(c) 3

(d) 4

I got this question by my college professor while I was bunking the class.

The query is from Synthesis of R-C Network by Foster Method topic in chapter Elements of Realizability and Synthesis of One-Port Networks of Network Theory

Answer 1

Correct option is (c) 3

For explanation I would say: On taking partial fraction of Z(s), we get the value of R∞ is 3Ω.

R∞ = 3Ω.