impedance at resonance

Discussion in 'Homework Help' started by cmp46, Jan 4, 2014.

  1. cmp46

    Thread Starter New Member

    Jan 4, 2014
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    Hi I am new to electric circuits and everything but I have a test coming up that covers this.

    In a series AC circuit, XL = 2350 ohms, C = 0.005 µF, and R = 500 Ω. What is the
    impedance at resonance?

    I would just really like to know how to solve this. Thank you!
     
  2. Jony130

    AAC Fanatic!

    Feb 17, 2009
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    For series LCR circuit Zo at resonance is equal R.
     
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  3. shteii01

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    Jony is right.
     
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  4. cmp46

    Thread Starter New Member

    Jan 4, 2014
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    thank you for the answer! Mind if i ask another one?
     
  5. crutschow

    Expert

    Mar 14, 2008
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    At resonance the capacitive reactance cancels the inductive reactance so the only impedance left is the resistance, as noted by the previous posters.
     
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  6. cmp46

    Thread Starter New Member

    Jan 4, 2014
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    well I also need help with two more questions:

    A 10 mH coil has a resistance of 100 ohms. At what frequency does XL = R ?

    When observing a 500 KHz square wave with an oscilloscope, what period would you expect to see? (For a full cycle)
     
  7. t_n_k

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  8. shteii01

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  9. cmp46

    Thread Starter New Member

    Jan 4, 2014
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    I am sorry. I just don't even know how to work those problems out. I have been searching for information and I am still lost so I thought it would be better to ask people who know for an explanation.
     
  10. shteii01

    AAC Fanatic!

    Feb 19, 2010
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    No offense, but not being able to figure out wave period in the Age of Google is kinda pathetic.
     
    Last edited: Jan 4, 2014
  11. bountyhunter

    Well-Known Member

    Sep 7, 2009
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    When I was in school, the teacher was supposed to know.....

    or use Google as somebody else suggested.
     
  12. bertus

    Administrator

    Apr 5, 2008
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