List of top Electronics and Communication Engineering Questions on Oscillators and Feedback Amplifier asked in AP PGECET

Given that \(R1=20\text{k}\Omega\), \(C1=2\text{nF}\), \(R2=20\text{k}\Omega\), \(C2=2\text{nF}\), find the approximate resonant frequency of a Wein bridge oscillator.
A negative feedback amplifier has an open-loop gain of 100 and a feedback factor \(\beta = 0.09\). If the open-loop gain changes by 10% due to aging, what is the percentage change in the closed-loop gain of the amplifier?
In Wien's bridge oscillator, if \( R_1 = R_2 \) and \( C_1 = C_2 \), then the typical values of open loop gain and feedback factor to obtain the sustained oscillations are