Question

In the circuit given below, the value of the hybrid parameter h21 is _________ (a) 10 Ω (b) 0.5 Ω (c) 5 Ω (d) 2.5 Ω The question was asked by my school teacher while I was bunking the class. My question is based upon Advanced Problems on Two Port Network in division 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

The correct choice is (b) 0.5 Ω Easiest explanation: Hybrid parameter h21 is given by, h21 = \frac{I_2}{I_1} , when V2 = 0. Therefore short circuiting the terminal Y-Y’, and applying Kirchhoff’s law, we get, -5 I2 – (I2 – I1)5 = 0 Or, -I2 = I2 – I1 Or, -2I2 = -I1 ∴ \frac{I_2}{I_1} = \frac{1}{2} Hence h21 = 0.5 Ω.