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Homework Help: Calculating Impedance Help

  1. Aug 12, 2011 #1
    Calculating Impedance Help!!

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

    calcuate the impedance at the frequency 10Hz of a:

    -4.7 kil0 ohm resistor
    -1microFarad capacitor
    -25mH inductor

    2. Relevant equations

    3. The attempt at a solution
    for the capacitor impedance= 1/20*Pi*1*10^-6

    for the inductor impedance=(1/20*Pi)*25*10^-3

    Are these correct? and how do i solve it for the 4.7kohm resistor??
  2. jcsd
  3. Aug 12, 2011 #2


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    Homework Helper

    Re: Calculating Impedance Help!!

    The resistor will just be its own value, the total impdence will be the complex sum of all three.

    Z = R +j(Xc+XL)
  4. Aug 12, 2011 #3
    Re: Calculating Impedance Help!!

    Your formula for finding the reactance of an inductor is not correct.
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