Question

If Z1, Z2 are same type of reactance, then |Z1/4 Z2| is real, then?

(a) |Z1/4 Z2| = 0

(b) |Z1/4 Z2| < 0

(c) |Z1/4 Z2| > 0

(d) |Z1/4 Z2| >= 0

I got this question in class test.

Origin of the question is Classification of Pass Band and Stop Band topic in division Filters and Attenuators of Network Theory

Answer 1

Right choice is (c) |Z1/4 Z2| > 0

Easiest explanation: If Z1 and Z2 are same type of reactances, then √(Z1/4 Z2) should be always positive implies that |Z1/4 Z2| > 0.