Question

A two branch parallel circuit has a 50 Ω resistance and 10 H inductance in one branch and a 1 μF capacitor in the second branch. It is fed from 220 V ac supply, at resonance, the input impedance of the circuit is _____________ (a) 447.2 Ω (b) 500 Ω (c) 235.48 Ω (d) 325.64 Ω This question was addressed to me in an interview for internship. My question is from Advanced Problems on Application of Laplace Transform topic in portion Application of the Laplace Transform in Circuit Analysis 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

Correct answer is (a) 447.2 Ω Easy explanation: We know that, For a parallel resonance circuit impedance = [\frac{L}{RC}]^{0.5} Given, R = 50 Ω, L = 10 H and C = 1 μF = [\frac{10}{50*1}]^{0.5} So, impedance = 447.2 Ω.