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Old 4th February 2002, 11:47 PM   #1
Helix is offline Helix  United Kingdom
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Default resonance in a LCR series

URGENT HELP REQUIRED!

I have a LCR series circuit, i have the following problem finding the Q.
F=resonant req
B=bandwidth


I thought the Q = F/B

where B = R/(2*pi*L)

my inductor is 68mH
capacitor = 2.2uF
Resistor = 100Ohm

so i found resonance at 411 Hz

But i calculate Q to be 1.75? shouldn't it be about 0.7?
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Old 5th February 2002, 12:00 AM   #2
Helix is offline Helix  United Kingdom
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sorted!
i fergot to add the DC resistance of the inductor (it's about 150ohms or so), perhaps it's time for another cup of coffee!
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