List of top Electronics and Communication Engineering Questions

Given that \( Z_0 = 50\Omega \), \( Z_L = (50 - j75)\Omega \), and \( P_i = 10 \) mW, find the power delivered to the load.
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 \( F(s) = \frac{1}{s^2(s+2)} \)
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
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?
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
Find the value of required resistor across AB of the following circuit to transfer maximum power?
value of required resistor across AB
A coil of resistance \(12 \Omega\) and inductance 18 H is suddenly connected to a dc supply of 30 V. Calculate time constant
The function \( \frac{dq}{dv} \) is called incremental then it is
Which factor determines the range resolution of a radar?
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)
A wave travelling in conducting medium, if its amplitude decreases by a factor of _____ it is called penetration depth of the medium.
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 \(\omega\).
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 \(\Omega\)?
Which one of the following is not true of a lossless line?
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
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.)
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.)
Which of the following function does not satisfy the wave equation?
Flat-top sampling leads to
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