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

If three equal resistances of \(12\Omega\) are connected in Delta, then each resistance of the equivalent Star is
When two, two-port networks are connected in series, then
Obtain the inverse Laplace transform of \( F(s) = \frac{1}{s^2(s+2)} \)
A transfer function is given by \( H(s) = \frac{2(s+2)(s+4)}{(s+3)(s+5)(s+7)} \). Then the transfer function becomes zero when
For a series RLC circuit which of the following statement is not correct?
The values of B and D of ABCD parameters of two port network respectively are
values of B and D of ABCD parameters of two port network
Driving point impedance of the function \( F(s) = \frac{(s+k_1)(s+k_2)(s+k_3)}{(s+1)(s+2)(s+3)} \) is
The function \( \frac{dq}{dv} \) is called incremental then it is
A coil of resistance \(12 \Omega\) and inductance 18 H is suddenly connected to a dc supply of 30 V. Calculate time constant
Find the value of required resistor across AB of the following circuit to transfer maximum power?
value of required resistor across AB
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)
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 \(\omega\).
Which factor determines the range resolution of a radar?
A wave travelling in conducting medium, if its amplitude decreases by a factor of _____ it is called penetration depth of the medium.
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 \(\Omega\)?
Flat-top sampling leads to
Which one of the following is not true of a lossless line?
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.)
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.)
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
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
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.)
As the bandwidth approaches infinity, the channel capacity becomes (Referring to Shannon-Hartley theorem: \(C = B \log_2(1 + S/N)\))
In delta modulation (DM) system, the granular noise occurs when the modulating signal