Question

For the given information Z11 = 3, Z12 = 1, Z21 = 2, Z22 = 1. Find the value of Y21.

(a) 2

(b) -2

(c) 1

(d) -1

The question was posed to me in examination.

I'd like to ask this question from Inner Relationships of Different Parameters topic in chapter Two-Port Networks of Network Theory

Answer 1

Correct option is (b) -2

For explanation I would say: We have the relation Y21=-Z21/∆z. ∆z=3-2=1 and given Z21 = 2. On substituting we get Y21=-2/1=-2.