A series \( L C R \) circuit with \( L=0.12 \mathrm{H}, C=480 \) \( \mathrm{nF}, \mathrm{R}=23 \...

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A series \( L C R \) circuit with \( L=0.12 \mathrm{H}, C=480 \) \( \mathrm{nF}, \mathrm{R}=23 \Omega \) is connected to a 230 variable frequency supply.
For which frequencies of the source is the power transferred to the circuit half the power at resonant frequency? What is the current amplitude at these frequencies?
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