Question

A constant k high pass p section has a characteristic impedance of 300 Ω at f = ∞. At f = fc, the characteristic impedance will be? (a) 0 (b) ∞ (c) 300 Ω (d) More than 300 Ω This question was posed to me in an international level competition. Origin of the question is Relation between Hybrid Parameters with Short Circuit Admittance and Open Circuit Impedance Parameters in section Two-Port Networks 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

Right option is (b) ∞ The explanation: For constant k high pass p section is given by, Z = \frac{R}{\sqrt{1 – (\frac{f_d}{f})^2}} At f = fd, denominator term is 0. So, Z = infinite.