Question

Consider an ideal op-amp filter shown in the figure below

$\text{Then, the cut-off frequency}{f}_c\text{is equal to}$

• A. 21.85 kHz
• B. 17.55 kHz
• C. 15.9 kHz
• D. 19.65 kHz

Answer 1

The correct option is C 15.9 kHz

$f_c=\frac{1}{2\pi R_{2}C}$

$=\frac{1}{2\pi \times 10\times {10}^3\times {10}^{-9}}=15.9\text{kHz}$