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

To save transmitted power, the carrier of an AM signal obtained by sinusoidal modulation to a depth of modulation equal to 1, has been recovered. The percentage saving in power is________.
The image channel selectivity of super heterodyne receiver depends upon ________.
Which of the following schemes suffer(s) from the threshold effect?
A pre-emphasis circuit provides extra noise-immunity by________.
A phase lag compensation will ________.
Given the unity feedback system with \( G(s) = \frac{K}{s(s+6)} \), the value of \( K \) for damping ratio of 0.75 is ________.
The discrete time Fourier transform of the signal, \( x(n) = 0.5^{(n-1)}u(n-1) \) is ________.
In a signal \( x(n) \), if ‘n’ is replaced by \( \frac{n}{3} \), then it is called ________.
The Z-transform of \( a^n \cdot u(n-1) \) is ________.
Which of the following system is causal?
In a negative feedback amplifier \( A = 100 \), \( \beta = 0.04 \) and \( V_s = 50\,\text{mV} \), then feedback will be _______.
How many T states are required for the execution of STA 7000H instruction?
In a LASER, which of the following processes have to be minimized.
Which IC is used for the implementation of 1-to-16 DEMUX?
A Schmitt trigger is ________.
Primary advantage of a crystal oscillator is that ________.
Output of a phase splitter is _______________.
In superposition theorem, voltage source is replaced by ________ and current source by ________.
A voltage source of 300 V has internal resistance of 4\(\Omega\) and supplies a load having the same resistance. The power absorbed by the load is
The current flowing through an unloaded voltage divider is called the ________.
For a base current of 10 \(\mu\)A, what is the value of collector current in common emitter, if \(\beta = 100\)?
A phase lag-lead network introduces in the output_______.
In AM_______.
An antenna has directivity of 100 and operates at 150 MHz. The maximum effective aperture is
Determine the Laplace transform of \(x(t) = (t^2 - 2t)u(t - 1)\)