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The inductance in the drawing has a value of L = 8.1 mH. What is the resonant frequency f0 of this circuit?

150 Ω 1,9 μ F

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Answer #1

X= R-i/(2pif0C) +i2pifL

at resonance

2pi f0L = 1/2pif0C

f0^2 = 1/(4pi^2LC)

f0=1/(2pi*sqrt(LC)) = 1/2pi *1/sqrt(8.1*10^-3*1.9x10^-6) = 1398Hz

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