An inductor 200 MH, capacitor 500µf, resistor 10Ω are connected in series with

 
100V variable frequency ac source. Calculate.
 
1)Frequency at which power factor of the circuit is unity.
2)Q factor

Given that

L = 200 mH = 200 × 10–3 H

C = 500 µF = 500 × 10–6 F

R = 10Ω

(i) Power factor is unit at the resonance frequency

= 15.92 Hz

(ii)

Q factor

=2

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