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Grade 12Modern Physics

For the series LCR circuit shown in the figure, what is the resonance frequency and the amplitude of the current at the resonating frequency

Question image for For the series LCR circuit shown in the figure, w

Yashika Nikhar

7 Years agoGrade 12

1 Answer

Susmita

7 Years ago

The resonance frequency of a series resonance circuit is

$w=\frac{1}{\sqrt{LC}}$

L=8mH=8×10^-3H and C=20uF=20×10^-6F

So w=2500 rad/s

At resonance the capacitive and inductive voltages cancel out each other,ie,V_L=-V_C.

so V_supply=V_R+V_L+V_C=V_R

so current through the resistance

I_R=V_R/R=V_supply/R =220/44=5.5A

Hope this helps

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