The quality factor of a series LCR circuit with $L=0.12 H$, $C=480$ nF and $R=25 \Omega$ connected to a 220 V variable frequency supply is
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The quality factor is often calculated using
\[
Q=\frac{\omega_0L}{R}
\]
or equivalently
\[
Q=\frac{1}{R}\sqrt{\frac{L}{C}}
\]
for a series LCR circuit.