List of top Electronics and Communication Engineering Questions

At very high electric fields in silicon, the drift velocity of electrons becomes independent of the electric field. This phenomenon is known as:

The primary characteristic of a tunnel diode is its _ _ _ _ .

Which of the following best describes the band structure of intrinsic silicon?

For a symmetrical two-port network, which of the following is NOT necessarily true?

What does the Laplace transform do the differential equation of an RLC circuit?

In sinusoidal steady-state analysis, which of the following best describes the use of phasors?

If a Delta circuit has branches \(R_{ab} = 10\ \Omega\), \(R_{bc} = 20\ \Omega\), and \(R_{ca} = 30\ \Omega\), what is the equivalent Wye resistor \(R_a\) connected to node?

For the given circuit, the values of \(R_{\text{th}}\) across the terminal AB and \(V_{\text{th}}\) are _ _ _ _ and _ _ _ _ , respectively.

The number of nodes in a graph having 5 branches and 2 independent loops is

Find the maximum gain of a \(\frac{\lambda}{2}\) wire dipole operating at 30 MHz?

The fraction of time that the transmitter is transmitting during one radar cycle is called

A rectangular waveguide with dimensions \(a=2.5\) cm, \(b=1\) cm is operating below 15 GHz. If the guide is filled with a medium characterized by \(\sigma=0\), \(\epsilon=4\epsilon_0\), \(\mu_r=1\), calculate the cutoff frequency of dominant mode?

For a lossy transmission line, the characteristic impedance does not depend on

The S-parameters are used at microwave frequencies because of the following reasons, except

Snell's law states that (\(n_1\) is the index of refraction of the first medium and \(n_2\) is that of second, \(\theta_t\) is the angle of refraction and \(\theta_i\) is angle of incidence)

Identify the polarisation of the wave given, \(E_x=2\cos\omega t\), \(E_y=2\sin\omega t\) and the phase difference is \(+90^\circ\)

The depth of penetration decreases, if

The characteristic impedance of the medium is

The Gauss's law for magnetic fields is

Which of the following is not correct if the intermediate frequency is too high?

The problem of reducing the gain of receiver for weak signals is avoided by

In communication receivers, the filter used to reduce receiver gain at some specific frequency is

The Foster-Seeley discriminator along with amplitude limiter is called

A four level PAM has a input data rate of \(2400~bits/s\) then the symbol rate is