Question

For the circuit given below, the value of input frequency which is required to cause a gain equal to 1.5 is _____________ (a) 20 rad/s (b) 20 Hz (c) 10 rad/s (d) No such value exists This question was addressed to me at a job interview. Question is taken from Advanced Problems on Magnetically Coupled Circuits topic in section Resonance & Magnetically Coupled Circuit 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 option is (d) No such value exists Easiest explanation: H (ω) = \frac{V_O}{V_i} = \frac{1}{1+jωRC} ∴ Gain = \frac{1}{\sqrt{1 + ω^2 RC}} For any value of ω, R and C gain is ≤ 1.