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 three-section RC phase shift oscillator has R = 10K ohms and C = 0.0

1.	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
Answer» D. 30 pF