resonanceis the condition under which the input impedance
(admittance) offered to the sinusoidal source is resistive.
•Series RLCcircuit is resonant at
ω
n
. At that frequency, the
impedance of the circuit is a minimumat Rand is resistive.
Circuit draws current at unity power factor. Voltage across
capacitor and inductor will be of equal amplitude; but opposite
in phase. The voltage amplification factor at resonance will
be Q or 1/2
ξ
.
•Parallel RLCcircuit is resonant at
ω
n
. At that frequency, the
impedance of the circuit is a maximumat Rand is resistive.
Circuit develops voltage at unity power factor. Current ...
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