The circuit shown in the figure below will act as an ideal source with respect to terminal A and B when the frequency is ___________(a) Zero(b) 1 rad/s(c) 4 rad/s(d) 16 rad/sThe question was posed to me by my college professor while I was bunking the class.My question comes from Advanced Problems on Resonance in section Resonance & Magnetically Coupled Circuit of Network Theory

The circuit shown in the figure below will act as an ideal source with

1.	The circuit shown in the figure below will act as an ideal source with respect to terminal A and B when the frequency is ___________(a) Zero(b) 1 rad/s(c) 4 rad/s(d) 16 rad/sThe question was posed to me by my college professor while I was bunking the class.My question comes from Advanced Problems on Resonance in section Resonance & Magnetically Coupled Circuit of Network Theory
Answer» The CORRECT answer is (c) 4 rad/s To explain: Z(s) t = \(\frac{(Ls)\frac{1}{Cs}}{Ls + \frac{1}{Cs}} = \frac{Ls}{LCs^2+1} \) PUTTING s = jω, we GET, Z (jω) = \(\frac{jωL}{1 -LCω^2} \) For ideal current SOURCE, Z (jω) = ∞ Or, 1 – LCω^2 = 0 Or, ω = \(\frac{1}{\sqrt{LC}} = \frac{1}{\sqrt{\frac{1}{16}×1}}\) = 4 rad/s.

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