Question

In the circuit given below, RI = 1 MΩ, RO = 10 Ω, A = 10^6 and VI = 1μV. Then the output voltage, input impedance and output impedance respectively are _________ (a) 1 V, ∞ and 10 Ω (b) 1 V, 0 and 10 Ω (c) 1V, 0 and ∞ (d) 10 V, ∞ and 10 Ω I have been asked this question during an internship interview. I need to ask this question from Advanced Problems on Network Theory in section Network Theory and Complex Circuit Diagram 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 answer is (a) 1 V, ∞ and 10 Ω To explain: VO (output voltage) = AVI = 10^6 × 10^-6 = 1 V V1 = Z11 I1 + Z12 I2 V2 = Z21 I1 + Z22 I2 Here, I1 = 0 Z11 = \frac{V_1}{I_1} = \frac{V_O}{0} = ∞ Z22 = \frac{V_2}{I_2} = \frac{AV_I}{I_2} Or, Z22 = \frac{1}{I_2} = RO = 10 Ω.