The correct formula for the Q factor is Q=R*(sqrt(C/L))

Now, the general formula for the Q factor is Q=(reactive power/average power)

the average power is the average power dissipated on the resistors
and the reactive power is the power stored by the capacitor or the inductor

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dear engineer, i'm just confused with how to calculate the q-factor of the resonant circuit of an FM transmitter circuit whereby i don't know how to estimate either the energy stored nor the dissipated.
Thank you

 

Welcome to the forums. Your question got placed on a 2 year old thread - http://forum.allaboutcircuits.com/showthread.php?t=10038
so I gave you your own.

 

Q or (figure of merit), is found by the ratio of XL/RL or XC/RC. By resonating your tuned circuit at different frequencies, you will find a peak at a particular frequency, where the resonant voltage peaks and the Q is maximum. RL AND RC are the series resistances. General Radio Co. used to make a Q meter that was very handy for testing various LCR combinations.

CHEERS!