Question

For the given information Z11 = 3, Z12 = 1, Z21 = 2, Z22 = 1. Find the value of Y11.

(a) 1

(b) -1

(c) 2

(d) -2

This question was addressed to me in an interview for job.

The question is from Inner Relationships of Different Parameters topic in section Two-Port Networks of Network Theory

Answer 1

Correct answer is (a) 1

For explanation: Y11 = Z22/∆z and ∆z=3-2=1 and Z22 = 1. So on substituting we get Y11 = 1/1 = 1.