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**

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**