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Grade: 12 

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

Answers : (1)

Susmita
425 Points 
							
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,VL=-VC.
so Vsupply=VR+VL+VC=VR
so current through the resistance
IR=VR/R=Vsupply/R =220/44=5.5A
Hope this helps
 
2 years ago
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