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Q-factor of an inductor

  1. Jan 29, 2009 #1
    Hi all,

    For a resonant system, there is usually a transfer of energy into another kind of energy back an forth (kinetic to potential; electric to magnetic, etc). for an LC tank or an RLC circuit, we know that the energy is transfered from as an electric field between the capacitor's plate to a magnetic field around an inductor coil.

    But, how come we can define a q-factor for an inductor alone?

    Thank you very much for your help :)
  2. jcsd
  3. Jan 29, 2009 #2


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    You can't.
    The Q-factor is a measure of how closely a real inductor comes to behaving like an ideal inductor; an ideal inductor would have an infinite Q at all frequencies but real inductors are made from resistive wire etc so there are always losses.
  4. Jan 29, 2009 #3
    You can define a Q-factor for many situations where oscillation occurs.

    Inductors, and capacitors have a Q when are subjected to AC. It sort of is a measure of deviation from an ideal component as said.
  5. Mar 3, 2009 #4
    Last edited by a moderator: Apr 24, 2017
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