Question

The relation between Z22 and Y parameters is?

(a) Z22 = (-Y11)/∆y

(b) Z22 = Y21/∆y

(c) Z22 = (-Y21)/∆y

(d) Z22 = Y11/∆y

I have been asked this question during an internship interview.

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

Answer 1

Right option is (d) Z22 = Y11/∆y

Easy explanation: V2=(-Y21/∆y)I1+(Y11/∆y)I2. The relation between Z22 and Y parameters is Z22 = Y11/∆y.