On my text book, there are several definition given for this Q factor.(adsbygoogle = window.adsbygoogle || []).push({});

1) 2 pi * maximum energy stored in reactive element / energy dissipated in a period

2)resonance frequency (in terms of ω) / band width

3)Q = 1/(2 * damping factor)

I have tried a couple of random circuits, and its seems not all of them are correct for arbitrary circuit. (Some o them may only true for simple RLC series of parallel).

May I ask which statement is always true?

My text book also says resonant frequency = natural frequency *(1-2*zeta^2) where zeta is damping factor

and undamped natural frequency is = natural frequency *(1-*zeta^2) where zeta is damping factor

Are these true for RLC series only??

Thank you!

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Q factor of a circuit.

**Physics Forums | Science Articles, Homework Help, Discussion**