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In an LCR ac circuit, the resistance and reactances R,XC and XL are in the ratio 1 : 3 : 4 .The frequency of ac is f0. The resonant frequency of the circuit will be

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a

34f0

b

34f0

c

43f0

d

f0

answer is B.

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Detailed Solution

XLXC=ω2(LC)=43, f0=12π43LC, now XL=XC⇒ω2=1LC⇒fr=12π1LC

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