Question

For the given information Z11 = 3, Z12 = 1, Z21 = 2, Z22 = 1. What is the value ∆y?

(a) 0

(b) 1

(c) 2

(d) 3

This question was addressed to me by my college professor while I was bunking the class.

This question is from Inner Relationships of Different Parameters in portion Two-Port Networks of Network Theory

Answer 1

The correct answer is (b) 1

For explanation I would say: ∆y is the determinant of y parameters. The value ∆y is (Y11)(Y22)-(Y12)(Y21). On substituting the values we get ∆y = (1)(3)-(-2)(-1)=1.