Question

which of the following should be selected for better tuning of an lcr circuit
1) R=15ohm L=3.5H C=30 microfaraday
​​1) R=10ohm L=3.5H C=30 microfaraday
1) R=5ohm L=3.5H C=30 microfaraday

Answer 1

Dear Student

$$\begin{gathered} thequalityfactorisgivenas \\ Q=\frac{1}{R}\sqrt{\frac{L}{C}} \\ Whereristheresis\tan ce \\ Listheinduc\tan ce \\ Cisthecapaci\tan ce \\ TomaketheQhigh \\ Rshouldbelow,LshouldbehighandCshouldbelow. \\ HenceOption \\ R=5ohmL=3.5HC=30microfaraday \\ isrightwhereR=5ohmisthelowestofalloption \end{gathered}$$

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