A series circuit consists of an ac source of variable frequency, a 100 ohm resis

Question

A series circuit consists of an ac source of variable frequency, a 100 ohm resistor, a 1.40 uF capacitor, and a 4.60 mH inductor. 1) Find the impedance of this circuit when the angular frequency of the ac source is adjusted to the resonance angular frequency. 2) Find the impedance of this circuit when the angular frequency of the ac source is adjusted to twice the resonance angular frequency. 3) Find the impedance of this circuit when the angular frequency of the ac source is adjusted to half the resonance angular frequency.

Explanation / Answer

a> impedance = 120 ohms

b> w0 = 1/LC = 0.41

w = 2w0 = 0.82

impedance = 120.03 ohm

c> impedance = 120.03 ohm

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