List of top Electronics and Communication Engineering Questions

Find the current $i_b$ in given circuit below.

In the given circuit a charge of 900 C is delivered to the 100 V source in a minute. The value of $V_1$ must be _______.

The intrinsic impedance of free space is _________.
Which of the following type of noise becomes of great importance at high frequencies?
As the aperture area of an antenna increases, its gain _________.
The main advantage of super heterodyne receiver is ________.
The occurrence of double spotting indicates that _________.
With some initial change at \(t = 0^+\), a capacitor will act as ________.
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 ________.
Dominant mode of propagation in a rectangular wave guide 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 ________.
An antenna driven by 6 Ampere current radiates 5 kW power into freespace. The radiation resistance of the antenna at 1 GHz frequency 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 ________.
Commercial band for FM broadcasting is ________.
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 ________.
M-ary encoding in Digital communication is done to achieve ________.
The purpose of a matched filter in a digital communication receiver is to _______.
Slope overload distortion occurs in ________.
Pre-emphasis and De-emphasis are used in ________.
Shannon’s channel capacity theorem supports the concept and need of ________.
The ability of a receiver to reproduce the exact replica of the transmitted signal at its output is described through its ________.
Fastest Logic family is ________.
For an LTI system______________.
For the standard second order system, with two poles lying at 60° , damping ratio is _______.
20dB/decade is equivalent to ________.