List of top Electronics and Communication Engineering Questions

VHF waves travel as _______.
The gate voltage in a JFET at which drain current becomes zero is called _______.
The drain current in a JFET is given by:
The emitter of a transistor is _______ doped.

Find the value for $i(t)$ from the circuit.

Find the $R_{eq}$ from the circuit.

Find the values of $V_{Th}$ & $R_{Th}$ in the given circuit.

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 _______.

As the aperture area of an antenna increases, its gain _________.
The intrinsic impedance of free space is _________.
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 ________.
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 ________.
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 ________.
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 ________.
An antenna driven by 6 Ampere current radiates 5 kW power into freespace. The radiation resistance of the antenna at 1 GHz frequency is ________.
Commercial band for FM broadcasting is ________.
Dominant mode of propagation in a rectangular wave guide 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 ________.
The purpose of a matched filter in a digital communication receiver is to _______.
Shannon’s channel capacity theorem supports the concept and need of ________.