Question

Obtain the transfer function G21 (S) in the circuit shown below.

(a) (s+1)/s

(b) s+1

(c) s

(d) s/(s+1)

The question was posed to me in quiz.

This interesting question is from Network Function for the One-Port and Two-Port in chapter S-Domain Analysis of Network Theory

Answer 1

The correct answer is (d) s/(s+1)

For explanation: Applying Kirchhoff’s law V1 (S) = 2 I1 (S) + 2 sI1 (S) V2 (S) = I1 (S) X 2s Hence G21 (S) = V2(s)/V1(s) = 2 s/(2+2 s)=s/(s+1).