Question

The carrier frequency generated by a circuit containing $1nF$ capacitor and $10\mu H$ inductor is

• A. $1592Hz$
• B. $1592kHz$
• C. $159.2Hz$
• D. $15.92kHz$

Answer 1

Answer: (B)

$C=1nF=10^{-9}F,L=10\mu H=10^{-5}H$
$f=\frac{1}{2\pi \sqrt{LC}}=\frac{1}{2\pi \sqrt{10^{-5}\times 10^{-9}}}=\frac{10^7}{2\pi }$
$=159.2\times 10^{4}Hz=1592kHz$