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Discussion :: Network Analysis and Synthesis

  1. A resistance R, inductance L and capacitance C are in series. The source frequency is adjusted to be equal to resonant frequency. The lower half power frequency is ω1. Another resistance R is added in series with the circuit. The new lower half power frequency will be

    2. A.
    ω1
    B.
    less than ω1
    C.
    more than ω1
    D.
    either more than ω1 or less then ω1

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    Answer : Option C

    Explanation :

    As R increases, Q decreases, bandwidth = . Therefore, bandwidth increases. Hence lower half power frequency will be less than ωr.

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