List of top Electronics and Communication Engineering Questions

The signal $x(t) = A\cos(\omega t + \phi)$ is:

Assertion (A): FET is a majority carrier device whereas BJT works based on movement of both majority and minority carriers. Reason (R): Thermal runaway occurs in FET circuits but does not occur in BJT circuits.

In a Quadrature Amplitude Modulation (QAM) scheme, information is encoded in:

If a fair coin is tossed 4 times, what is the probability that two heads and two tails will result?

According to Nyquist stability criterion, the number of unstable closed-loop poles (Z) is equal to:

Assertion (A): Feedback control systems offer more accurate control over open-loop systems. Reason (R): Feedback establishes a link for input-output comparison and correction.

A source generates symbols with probabilities (0.5, 0.25, 0.25) at a rate of 300 symbols per second. The most efficient source encoder would have average bit rate:

Which of the following theorems from calculus relate an integral over a region to an integral over its boundary? A. Stoke’s theorem B. Gauss’s divergence theorem C. Mean value theorem D. Taylor series

The Nyquist sampling theorem states that for a signal with maximum frequency $f_m$, the sampling frequency must be:

Arrange correct sequence of time domain specifications of a second order system in ascending order of values: A. Rise time B. Settling time C. Delay time D. Peak time

Port 80 is used for:

Which of the following are fundamental concepts from Shannon's information theory? A. Entropy B. Matched filter receiver C. Auto correlation D. Channel capacity theorem

A Zener diode is primarily used for:

Assertion (A): With lag-lead compensator, the bandwidth of the system is not affected much. Reason (R): The effect of lag and lead compensation at high frequencies cancel one another.

Order of rectifier circuits in decreasing ripple factor:

Arrange these concepts in the logical flow from fundamental laws to wave propagation: A. Wave equation B. Maxwell's equations C. Boundary conditions D. Poynting vector

Which protocol in the TCP/IP suite is responsible for breaking data into packets and reassembling them at the destination providing reliable, connection-oriented delivery?

A metal sphere with 1 m radius and a surface charge density of $10 \,\text{C/m}^2$ is enclosed in a cube of side 1 m. The total outward electric displacement flux normal to the surface of the cube is:

DNS is primarily used for:

Signal flow graph is used to find:

The pointing vector $\vec{P} = \vec{E} \times \vec{H}$ represents:

Find the inverse of the given matrix: \[ A = \begin{bmatrix} 1 & 0 & 1 \\ -1 & 1 & 1 \\ 0 & 1 & 0 \end{bmatrix} \]

Which layer in IoT architecture is responsible for data acquisition using sensors?

The differential equation $\dfrac{d^2y}{dx^2} + \dfrac{dy}{dx} + \sin y = 0$ is:

Which of the following is a sequential logic circuit?