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

The output voltage of a transistor amplifier is 12 V when the input is 2 V. What is the voltage gain of the amplifier?
What is the bandwidth of a signal if the highest frequency is 5 kHz and the lowest frequency is 2 kHz?
What is the size of the address bus in a 16-bit microprocessor?
Which of the following represents the correct relationship between the speed of light \( c \), frequency \( \nu \), and wavelength \( \lambda \)?
Find the value of required resistor across AB of the following circuit to transfer maximum power?
value of required resistor across AB
In lossless medium for which \( \eta = 60\pi \), \( \mu_r = 1 \) and \( H = -0.1\cos(\omega t - z) \hat{a}_x + 0.5\sin(\omega t - z) \hat{a}_y \text{ A/m} \), calculate \(\omega\).

The array factor of an N element linear uniform array is \(\newline\) (\(\Psi = \beta d \cos\theta + \alpha\), \(\beta = \frac{2\pi}{\lambda}\), d = spacing between elements and \(\alpha\) = inter element phase shift)

If a small single-turn loop antenna has a radiation resistance of 0.04 \(\Omega\), how many turns are needed to produce a radiation resistance of 1 \(\Omega\)?
If in a rectangular waveguide for which \(a=2b\), the cutoff frequency for TE\(_{01}\) mode is 12 GHz, the cutoff frequency for TM\(_{11}\) is
Which one of the following is not true of a lossless line?
Which of the following function does not satisfy the wave equation?
The Maxwell's equation \( \oint \vec{E} \cdot d\vec{l} \) is equal to
A loop is rotating about the y-axis in a magnetic field \( B = B_0 \sin \omega t \ \hat{a}_z \text{ Wb/m}^2 \). The voltage induced in the loop is due to (Note: \(\hat{a}_z\) means the B field is in the z-direction. The loop rotates about y-axis.)
According to Parseval's theorem the energy spectral density curve is equal to the area under (The question is phrased a bit oddly. "energy spectral density curve is equal to the area under..." Parseval's theorem relates energy in time domain to energy in frequency domain. The area under the Energy Spectral Density (ESD) curve *is* the total energy.)
Flat-top sampling leads to
Which one of the following is true?
As the bandwidth approaches infinity, the channel capacity becomes (Referring to Shannon-Hartley theorem: \(C = B \log_2(1 + S/N)\))
Which of the following is incorrect? (Assuming H refers to Entropy in Information Theory)
The input to a matched filter is given by \( S(t) = 10 \sin(2\pi \times 10^6 t), 0<t<1 \) second. The peak amplitude of the filter output is (Note: The duration \(0<t<1\) second is very long for a 1 MHz signal. This implies many cycles. Energy of the signal will be large.)
Which of the following modulation scheme gives the maximum probability of error?
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
In delta modulation (DM) system, the granular noise occurs when the modulating signal
Companding is used in PCM to
The main advantage of TDM over FDM is
The maximum permissible distance between two samples of a 2 kHz signal is