List of top Electronics and Communication Engineering Questions asked in Andhra Pradesh Post Graduate Engineering Common Entrance Test

Coherent demodulation of FSK signal can be detected using
The use of non-uniform quantization leads to
For a modulation index much less than 1, the FM signal is considered as
A transfer function of control system does not have pole-zero cancellation. Which one of the following statements is true?
In PCM, if the number of quantization levels is increased from 4 to 64, then the bandwidth requirement will approximately equal to
At a given probability of error, binary coherent FSK is inferior to binary coherent PSK by
Identify the true statement with reference to immediate addressing mode
If the highest modulation frequency is 5 kHz, find out bandwidth.
Which of the following analog modulation schemes requires the minimum transmitted power and minimum channel bandwidth?
Routh Hurwitz criterion is used to determine
If the characteristic equation of a closed-loop system is \( s^2 + 2s + 2 = 0 \), then the system is
In a Proportional-Integral-Derivative (PID) controller
Consider a stable linear time-invariant (LTI) system with a transfer function G(s). Which of the following statements regarding Bode and Nyquist plots is true?
The roots of the characteristic equation \(2S^3 + 3S^2 + 4S + 6 = 0\) are
Which one of the following is not the property of root loci?
In the signal flow graph of figure \( \frac{y}{x} \) equals
signal flow graph of figure
A signal is processed by a causal filter with transfer function \( G(s) \). For a distortion-free output signal waveform, \( G(s) \) must
Which type of control system uses both feedforward and feedback control strategies?
The open-loop DC gain of a unity negative feedback system with closed-loop transfer function is given by \( \frac{5}{4 + 5s + 13s^2} \), what is the open-loop DC gain?
According to Nyquist stability criterion, where should be the position of all zeros of \( G(s) \) corresponding to \( s \)-plane?
According to Nyquist stability criterion, where should be the position of all zeros of $G(s)$ corresponding to $s-plane$?
The polar plot of a transfer function passes through the critical point (+1,0). Gain margin is
What is the fundamental angular frequency in rad/sec for the given waveform?
fundamental angular frequency in rad/sec
A discrete-time signal \( x[n] = \sin(\pi n^2) \), where \( n \) is an integer, is
Find the initial value, if it exists of the signal with Laplace transform given below:
\[ X(s) = \frac{s + 4}{s^2 + 3s + 5} \]