A series circuit consists of an ac source of variable frequency, a 115- resistor, a 1.25-F capacitor,

Question:

A series circuit consists of an ac source of variable frequency, a 115- Ω resistor, a 1.25-μF capacitor, and a 4.50-mH inductor. Find the impedance of this circuit wben the angular frequency of the ac source is adjusted to
(a) The resonance angular frequency;
(b) Twice the resonance angular frequency;
(c) Half the resonance angular frequency.