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What is the resonant frequency of a parallel RLC circuit if R is 4.7 kilohms, L is 15 microhenrys and C is 5 picofarads?
18.4 MHz
Resonant frequency (fr) of a parallel RLC circuit (assuming high Q) is fr = 1 / (2π√(LC)). With L=15µH and C=5pF, fr = 1 / (2π√(15e-6 × 5e-12)) ≈ 18.375 MHz.
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