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Inductor/Resistor/Capacitor Equivalency

Discussion in 'Electronic Basics' started by Monty Hall, Nov 23, 2004.

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  1. Monty Hall

    Monty Hall Guest


    I'm a Chemical Engineer that took an "Electrical Engineering for
    Non-Electrical Engineers" class as part of my degree ~7 years ago. I was
    wondering if somebody can reconstruct my failing memory when I recalled my
    instructor saying something to the effect that "For a resistor, inductor,
    capacitor, one can be simulated by the other two" I don't recall in what
    context he was speaking - or if I'm recalling it correctly. It definetly
    had something to do w/ interchangeability. Can somebody direct me to a text
    or website concerning this matter?


  2. Nope, can't simulate an inductor using a resistor and capacitor.
    Use a capacitor and an operational amplifier?

    Perhaps he meant that you can construct a single-stage lowpass filter
    using either an inductor *or* a capacitor, plus a resistor. Same is
    true for hipass.
  3. Steve Evans

    Steve Evans Guest

    Nope! Can't be done iMHO, whichever way you look at it.
  4. Externet

    Externet Guest

    In an alternating current context, a resistive value R can be obtained
    as capacitive reactance Xc=R or by inductive reactance XL=R.
    XL = 2¶fL
    Xc = 1÷2¶fC
    In resonant circuits, capacitors and inductors together (in series or
    parallel) can also yield a resistive value equal to R from a resistor.

    Maybe that is what you mean.
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