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Homework Help: Can Somebody Check My Work For Me? Circuits

  1. Feb 21, 2010 #1
    Hi here is the problem:
    vg2ccx.jpg


    What I did was Z=[(XL-Xc)2+R2]1/2 = 5 ohm

    and then V/R = I = 110(2)1/2/5=31.1A

    For part B) I did V=L(di/dt)=-Lwsin(wt), and the peak amplitude is when sin(wt)=-1 and is 377V.

    Can someone tell me if what I did is right, or what is wrong?

    Thanks.
     
    Last edited: Feb 21, 2010
  2. jcsd
  3. Feb 21, 2010 #2

    kuruman

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    Your impedance formula is incorrect. Also, what value did you use for ω?
     
  4. Feb 21, 2010 #3
    Sorry I meant +R not -R..but I used the right formula when calculating the value of 5. For w I used 2(pi)f=377 Hz
     
  5. Feb 21, 2010 #4

    kuruman

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    Looks OK then. I assume that you plugged in the numbers and got XC and XL correctly.
     
  6. Feb 21, 2010 #5
    I did (wL-1/(wC)^2 for XL-Xc
     
  7. Feb 21, 2010 #6

    kuruman

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    That's fine. I hope you plugged in correctly.
     
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