Question

The expression of short circuit impedance Zsc is? (a) Zsc=(Z1^2-4Z1Z2)/(2Z1-4Z2) (b) Zsc=(Z1^2+4Z1Z2)/(2Z1+4Z2) (c) Zsc=(Z1^2-4Z1Z2)/(2Z1+4Z2) (d) Zsc=(Z1^2+4Z1Z2)/(2Z1-4Z2) I have been asked this question by my college director while I was bunking the class. The doubt is from Filter Networks topic in portion Filters and Attenuators of Network Theory Select the correct answer from above options network theory questions and answers, network theory questions pdf, network theory question bank, network theory gate questions and answers pdf, mcq on network theory pdf, gate network theory questions and solutions, network theory mcq Test , ies network theory questions, Network theory Questions for GATE EC Exam, Network Theory MCQ (Multiple Choice Questions)

Answer 1

The correct choice is (b) Zsc=(Z1^2+4Z1Z2)/(2Z1+4Z2) The best I can explain: On short circuiting the port 2 of T-section, we get the expression of short circuit impedance Zsc as Zsc=(Z1/2)+((Z1/2)xZ2)/((Z1/2)+Z2). On solving we get Zsc=(Z1^2+4Z1Z2)/(2Z1+4Z2).