Are these the right frequencies for this RLC circuit?

Discussion in 'Homework Help' started by lll, Apr 26, 2012.

  1. lll

    Thread Starter New Member

    Mar 7, 2012
    21
    1
    The circuit is attached (disregard answer choices).

    I have doubts about whether I found the right frequencies because they result in weird looking roots for the characteristic equation. So I just want to check that I have them right.

    (alpha) = 2500000
    (omega0) = 10000

    Are these right?
     
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  2. t_n_k

    AAC Fanatic!

    Mar 6, 2009
    5,448
    782
    You don't need the CE because you are only concerned with the instant the switch turns on. At that point the rate of change of current is simply Vdc/L A/sec.
     
    lll likes this.
  3. lll

    Thread Starter New Member

    Mar 7, 2012
    21
    1
    Thanks, that one was giving me a hard time. I didn't realize that the initial inductor voltage was the same as the source voltage, but since the initial current through resistor is 0, and the initial cap voltage is 0, I guess it is.
     
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