Question

A series LCR circuit resonates at 10 kHZ. If the capacitor is 0.01 $\mu$F, the inductance used is approximately

• A. 10 mH
• B. 25 mH
• C. 50 mH
• D. 100 mH

Answer 1

Answer: (B)

$f=\frac{1}{2\pi }\frac{1}{\sqrt{LC}},10^4=\frac{1}{2\pi }\times \frac{1}{\sqrt{L\times 10^{-8}}},L\approx \frac{1}{40}H,L\approx 25mH$