Analog Electronics - Engineering

Q1:

A three-section RC phase shift oscillator has R = 10K ohms and C = 0.001 μF. If the oscillator is to be made variable using the same value of R, what should be the value of capacitor to obtain a frequency if 1 kHz?

A 636 pF

B 180 pF

C 65 pF

D 30 pF

ANS:C - 65 pF

The formula is, f=1/(2*π*R*C) √(6).