Help on understanding LC circuit

Discussion in 'General Electronics Chat' started by francopolli, Jul 7, 2012.

  1. francopolli

    Thread Starter New Member

    Jul 7, 2012
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    0
    I am a beginner and trying to understand the resonant frequency formula for a tank LC circuit. f=1/2pi*sqrt(l*c).
    If i know only F and C and i need to calculate L... i can't understand why the formula becomes L=1/4*pi*pi*F*F*C
    I know i am missing something here but i can't figure what.
     
  2. MrChips

    Moderator

    Oct 2, 2009
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    What do you not understand?
    Seems clear to me.
     
  3. crutschow

    Expert

    Mar 14, 2008
    13,056
    3,245
    To extract the L from the equation you need to take the square of both sides of the equation. Then rearrange the terms to give the value of L.
     
    francopolli likes this.
  4. WBahn

    Moderator

    Mar 31, 2012
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    How much algebra, if any, have you had so far? That will help us explain things at a level that matches your math background.
     
  5. francopolli

    Thread Starter New Member

    Jul 7, 2012
    2
    0
    Thank you guys! My head wasn't working :D
    Algebra knowledge is average and i was forgetting to "square" the 2... hence i was puzzled by the "4"

    BTW this site is great;)
     
  6. WBahn

    Moderator

    Mar 31, 2012
    17,788
    4,808
    We all suffer from that from time to time.

    In the future, try to say WHY you are having a problem and, if possible, what you think the answer should be (or what your work is coming up with, even if you know it is wrong). Best is to post your work, or at least a summary of it.

    Welcome aboard!
     
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