List of top Electronics and Communication Engineering Questions on Electronics

Match List-I with List-II.

The Ebers-Moll model is applicable to ________.
The ratio of the power radiated by an antenna to the total input power to the antenna is termed ________.
The number of propagating modes through an air filled rectangular waveguide of dimensions, \( a = 5 \text{ cm} \) and \( b = 2.5 \text{ cm} \) at 8 GHz frequency is ________.
The units of magnetic permeability and magnetic flux density respectively are ________.
For a 4-point sequence {0, 1, 2, 3}, FFT is ________.
Two functions F1 and F2 to be implemented using a suitable size PLA are given as F1 = ∑m(0, 1, 2, 4) and F2 = ∑m(0, 5, 6, 7). Minimum number of product terms necessary is ________.

In the signal flow graph of given figure, \( \frac{y}{x} \) equals ________.

For handling multiple input, multiple output system _______ is used.
Find the Fourier transform of the given signal \(x(t) = e^{-t}u(t - 2)\)
The energy of a signal \(A\delta[n]\) is _______.
Determine the continuous time convolution integral and choose correct option for:
\(y(t) = [u(t) - u(t - 2)] * u(t)\)
The intrinsic impedance of free space is _________.
As the aperture area of an antenna increases, its gain _________.
Which of the following type of noise becomes of great importance at high frequencies?
The occurrence of double spotting indicates that _________.
The main advantage of super heterodyne receiver is ________.
The standing wave ratio of an open wire transmission line having a characteristic impedance of 600\(\Omega\) and terminated by resistive load of 900\(\Omega\) will be ________.
A uniform plane wave travels through fresh water characterised by \(\varepsilon_r = 78\). Fresh water is non-magnetic and non-conducting. The wavelength of propagation in fresh water at an operating frequency of \(300~\text{MHz}\) is ________.
Dominant mode of propagation in a rectangular wave guide is ________.
The skin depth of a wave propagating through aluminium medium of conductivity \(\sigma = 38.2~\text{MS/m}\) is computed at \(1.6~\text{MHz}\) frequency as \(64.4~\mu m\). The skin depth into the same medium at \(6.4~\text{MHz}\) frequency is ________.
A propagating wave in a lossless medium along z-direction has x and y electric field components both sinusoidal of same amplitude and in phase with each other. The wave is ________.
Shannon’s channel capacity theorem supports the concept and need of ________.
Pre-emphasis and De-emphasis are used in ________.
The ability of a receiver to reproduce the exact replica of the transmitted signal at its output is described through its ________.