Question

The expression of the open circuit impedance Zoc is?

(a) Zoc=Z1/2+Z2

(b) Zoc=Z2/2+Z2

(c) Zoc=Z1/2+Z1

(d) Zoc=Z1/2-Z2

The question was asked by my college director while I was bunking the class.

My question is taken from Filter Networks in division Filters and Attenuators of Network Theory

Answer 1

The correct option is (a) Zoc=Z1/2+Z2

The explanation is: On open circuiting the port 2 of T-section, we get the expression of the open circuit impedance Zoc as Zoc=Z1/2+Z2.