List of top Electronics and Communication Engineering Questions

The voltage equivalent of temperature ($V_T$) in a $p\text{-}n$ junctions is given by}

What type of semiconductor is used in LED ?

In an R-C circuit, when the switch is closed, the response _______.

Find the voltage at node P, shown in the figure.

In the circuit shown, find the current through $4\Omega$ resistor using Superposition theorem.

For every tree there will be ______ number of cut set matrices.

Find current $i_2$ in the shown network

Which of the following is the primary condition that must be satisfied at the boundary of a perfect electric conductor (PEC) for an electromagnetic wave?

The radiation pattern of a dipole antenna is characterized by,

Which of the following statements is NOT true about Maxwell's equations in differential form?

The skin depth in a conductor is:

For a WSS random process, the autocorrelation $R_x(\tau)$ as $\tau \rightarrow \infty$ approaches:

The total average power of a signal equals:

A Gaussian noise channel has a bandwidth of $4\text{ kHz}$ and a signal-to-noise power ratio (SNR) of $15$. According to the Shannon-Hartley theorem, what is the maximum capacity of this channel?

In a coherent BPSK modulation scheme, if the input bit rate is doubled while keeping the symbol energy as constant, what is the effect on the transmission bandwidth ($BW$) and the probability of bit error ($P_e$)?

Which of the following is a salient feature of GSM _____.

Which of the following digital modulation schemes has the lowest probability of error at a given SNR?

What is the primary advantage of using a super-heterodyne receiver?

Gain cross over frequency is the frequency at which _______.

For the state equation $\dot{x} = 3x$ , the system is _______.

Which part of a PID controller is specifically responsible for eliminating the steady-state error?

A phase-lead compensator is primarily used to _______.

If the open-loop transfer function $G(s)H(s)$ has one pole in the right-half of the $s$-plane, for the closed-loop system to be stable, the Nyquist plot must encircle the $(-1, j0)$ point _______.

The characteristic equation of a system is $s^3 + 3s^2 + 3s + 1 = 0$. How many poles lie in the right half plane?

A second order system has $\omega_n = 4\text{ rad/sec}$ and $\zeta = 0.5$. What is the damped natural frequency $\omega_d$ ?