List of top Questions asked in AP PGECET- 2026

A second order system has $\omega_n = 4\text{ rad/sec}$ and $\zeta = 0.5$. What is the damped natural frequency $\omega_d$ ?
For a discrete-time periodic signal with period $N$, how many distinct Fourier coefficients exist?
The characteristic equation of a system is $s^3 + 3s^2 + 3s + 1 = 0$. How many poles lie in the right half plane?
What is the Fourier Transform of a Gaussian function $e^{-t^2}$ ?
In FFT computation, reducing complexity from $O(N^2)$ to $O(N \log_2 N)$ relies fundamentally on _______.
In a causal and stable LTI system, the impulse response $h(t)$ must satisfy which condition ?
If the impulse response of a discrete-time LTI system is finite in length, which property is always guaranteed?
What is the primary difference between CTFT and DTFT?
Signal distortionless transmission through an LTI system requires:
The frequency response magnitude of a DT-LTI system tends to infinity when
The logic family which is least affected by temperature variations, is
In a positive edge-triggered $JK$ flip-flop, the $J$ input is connected to $\bar{Q}$ (inverted output) and the $K$ input is connected to $Q$ (normal output). If the flip-flop is initially in the RESET state ($Q=0, \bar{Q}=1$) and is subjected to 4 consecutive positive clock pulses, what will be the final state of $Q$?
If a sample and hold circuit is not used with an ADC, the result may be _______.
A ring counter (with 4 flip-flops) has how many unique states?
The minimal SOP expression for a 3-variable function having \(m\) in terms of \(\sum m(1,3,5,7)\) is
A two-stage RC-coupled amplifier has stage-1 lower cutoff frequency \(f_{L1} = 100\text{ Hz}\) and stage-2 lower cutoff frequency \(f_{L2} = 1\text{ kHz}\). The overall lower cutoff frequency of the amplifier is approximately:
A full-wave rectifier has a load resistor of \(1\text{ k}\Omega\) and a capacitor of \(100\ \mu\text{F}\). Doubling the load resistor will _ _ _ _ .
Which of the following is a common application of a 555 timer in monostable mode?
In an op-amp, which of the following best describes the ‘virtual short’ concept?
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 a MOSFET small-signal model, if the drain current is doubled while maintaining the same device dimensions, the trans-conductance will:
A positive clamper circuit with a 10V DC source is fed with a 20V p-p sinusoidal input. What is the minimum DC voltage level at the output?
Which of the following is a characteristic of the MOS capacitor?
In an n-channel JFET, if the gate voltage is made more negative than the pinch-off voltage, what happens to the drain current?
What distinguishes the light emitted by a LASER diode from an LED?