List of top Electronics and Communication Engineering Questions asked in Telangana State Post Graduate Engineering Common Entrance Test

Which of the following is incorrect? (Assuming H refers to Entropy in Information Theory)
In delta modulation (DM) system, the granular noise occurs when the modulating signal
The number of bits per sample in a PCM system with sinusoidal input is increased from n to n+1. The improvement in signal to quantization noise ratio will be
Which of the following modulation scheme gives the maximum probability of error?
The figure of merit ratio of FM to PM for single tone modulating signal is
A narrowband FM does not have the following feature
The maximum permissible distance between two samples of a 2 kHz signal is
The main advantage of TDM over FDM is
Companding is used in PCM to
A DSB-SC signal can be demodulated using
The image channel rejection in superheterodyne receiver comes from
The characteristic equation of a control system is given by \( s(s+1)(s^2+2s+1)+k(s+2)=0 \). The angles of asymptotes of the root loci are
The positive RF peaks of an AM voltage rise to maximum value of 12V and drop to a minimum value of 4V. Assuming single tone modulation, the modulation index is
The limit cycles describe the ____ of non-linear systems
Thermal noise is independent of
The plot of modulation index versus carrier amplitude yields a
The state model is _____, the transfer function of the system is ____
The main advantage of Bode plot is to
If the contour of the open-loop transfer function G(s)H(s) corresponding to the Nyquist contour in the s-plane encircle to the point ____, the closed loop system is stable (The blank should be the critical point \((-1+j0)\) or just \(-1\).)
Addition of a pole at the origin to a transfer function rotates the polar plot at zero and infinite frequencies by a further angle of
The gain cross over frequency is the frequency at which the \(|G(s)H(s)|\) is (Note: s should be \(j\omega\) for frequency response magnitude) \(|G(j\omega)H(j\omega)|\)
Consider an open-loop unstable system with the transfer function \( G(s)H(s) = \frac{s+2}{(s+1)(s-1)} \) when the feedback path is closed, then the system is
Which of the following is not correct with respect to Phase Lead Compensator?
The \(a_{ij}\) is the ___ of the branch directed from node \(x_i\) to \(x_j\) in signal flow graph. (Note: The blank is after "is the". Assuming it asks what \(a_{ij}\) represents.)
From the following Routh array table, which tells us that there are
\( S^n \)Col 1Col 2Col 3
\( S^5 \)2 1 
\( S^4 \)321
\( S^3 \)\(-\frac{4}{3}\)\(-\frac{2}{3}\) 
\( S^2 \)\(\frac{1}{2}\)1 
\( S^1 \)2  
\( S^0 \)1