Question

The expression for upper half power frequency is? (a) (R+√(x^2+4LC))/4πL (b) (R-√(x^2+4LC))/4πL (c) (–R-√(x^2+4LC))/4πL (d) (-R+√(x^2+4LC))/4πL This question was posed to me in homework. My question is taken from Bandwidth of an RLC Circuit in portion 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 answer is (a) (R+√(x^2+4LC))/4πL Explanation: The narrower the bandwidth the greater the selectivity. At upper half power frequency, XC < XL => -(1/2πf2C)+2πf2L=R. f2 = (R+√(x^2+4LC))/4πL.