Question

For the circuit given below, the value of the hybrid parameter h11 is ___________ (a) 75 Ω (b) 80 Ω (c) 90 Ω (d) 105 Ω This question was addressed to me during an online exam. Question is taken from Advanced Problems on Two Port Network 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 choice is (a) 75 Ω The best I can explain: Hybrid parameter h11 is given by, h11 = \frac{V_1}{I_1} , when V2=0. Therefore short circuiting the terminal Y-Y’, we get, V1 = I1 ((50||50) + 50) = I1 \left(\left(\frac{50×50}{50+50}\right) + 50\right) = 75I1 ∴ \frac{V_1}{I_1} = 75. Hence h11 = 75 Ω.