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Electromagnetic Waves: EM Wave

  1. Jul 12, 2009 #1
    AC Circuits II: AC Power Generator

    1. The problem statement, all variables and given/known data

    A An AC generator supplies an rms voltage of 110 V at 60.0 Hz. It is connected in series with a 0.300 H inductor, a 5.80 μF capacitor and a 236 Ω resistor.
    What is the impedance of the circuit?

    B What is the rms current through the resistor?

    C What is the average power dissipated in the circuit?

    D What is the peak current through the resistor?

    E What is the peak voltage across the inductor?

    F What is the peak voltage across the capacitor?

    G The generator frequency is now changed so that the circuit is in resonance. What is that new (resonance) frequency?

    2. Relevant equations

    Z=[R^2+(XL-Xc)^2]^(1/2)
    XL=2pifL
    Xc=1/(2pifc)

    Part E: VL=[(2^.5)*Vrms]/Z
    Part F: VL=[(2^.5)*Vrms]/Xc

    3. The attempt at a solution

    I need help for part E and F

    I substituted the numbers in the equation and I got the wrong answer.

    Xc=457.34
    Vrms=110
    Z=4.17×10^2
     
    Last edited: Jul 12, 2009
  2. jcsd
  3. Jul 12, 2009 #2

    hage567

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    Homework Helper

    The equation you were given is for the electric field, though. Part B is asking about the magnetic field.
     
  4. Jul 12, 2009 #3
    Thanks, I didn't see that one. I changed the forum to a different question. Do you think you can help me with this one?
     
  5. Jul 12, 2009 #4

    LowlyPion

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    Please don't change the questions.

    If you have a further related question, then just add it.

    If it's different then start a new thread. Otherwise, people may not pick up on the fact that your new question requires attention.
     
  6. Jul 12, 2009 #5
    Oh sorry about that, I made a new one.
     
  7. Jul 12, 2009 #6

    hage567

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    Homework Helper

    It also makes any help given look like nonsense.

    That'll teach me not to forget to quote it next time. :redface:
     
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