Practice previous years' questions for Electromagnetics, Antennas, Microwave Engineering, Digital Communication, Signals & Systems, Analog Electronics, VLSI, and Optical Communications.
Marking scheme: +3.00 positive, -0.75 negative (ICRB Standard).
When VSWR is 3, the magnitude of the reflection co-efficient will be
The conductivity of the intrinsic germanium at $300^\circ\text{K}$ is _____ When, $n_i$ at $300^\circ\text{K} = 2.5 \times 10^{13}/\text{cm}^3$ and $\mu_n$ and $\mu_p$ in germanium are 3800 and $1800\text{ cm}^2/\text{Vs}$ respectively.
As compared to a full wave rectifier using 2 diodes, the four diode bridge rectifier has the dominant advantage of
In a real time system, the simplest scheme that allows the operating system to allocate memory to two processes simultaneously is
$$(\cos 5\theta - i\sin 5\theta)^2\text{ is same as}$$
In case of which of the following, an increase on the modulation index leads to increase in bandwidth
Four voice signals, each limited to 4 kHz and sampled at Nyquist rate, are converted into binary PCM signal using 256 quantisation levels. The bit transmission rate for the time division multiplexing signal will be
If a counter having 10 FFs is initially at 0, what count will it hold after 2060 pulses?
The output of a circular convolution performed on two signals $x_1(n) = \{\underline{2}, 1, 2, 1\}$ and $x_2(n) = \{\underline{1}, 2, 3, 4\}$ is
When using a sequential code to design a combinational logic in VHDL, if complete truth table is not defined, the synthesis tool will implement a _____ which is not required.
In what order the elements of a pushdown stack are accessed?
What is the value of C such that equivalent capacitance across x-y is 5F
A wave guide section in a microwave circuit will act as a
A 24V, 600mW Zener is to be used for providing a 24V stabilized supply to a variable load. Assume that for proper Zener action, a minimum of 10 mA must flow through the Zener. If the input voltage is 32V, what would be the value of R and the maximum load current?
The value of x at which y has a minimum for $y = x^2 - 3x + 1$ is
Determine the matched filter response $h(t)$ for signal $s(t)$ shown below :
A signal source with 100m wavelength is connected to the input terminals of a 150m long transmission line terminated in its characteristic impedance. The phase difference between the voltages at two ends of the transmission line in steady-state condition is :
A charge $Q_2 = 8.854 \times 10^{-9}\text{ C}$ is located in a vacuum at $P_2(2, 3, 1)$. The force on $Q_2$ due to a charge $Q_1 = 4\pi \times 10^{-3}\text{ C}$ at $P_1(2, 2, 1)$ is (Note: All the coordinates are measured in Meters. $a_x$, $a_y$ and $a_z$ are unit vectors in X, Y and Z direction respectively.)
A low pass filter as shown in following figure is built using an operational amplifier having unity gain bandwidth of 1MHz. What is the bandwidth of this circuit?
What is the frequency and duty cycle of output Y, when CLK frequency is 1MHz @ 50% duty cycle?
For an isotropic radiator, electric field intensity at a distance R is measured as $3\text{V/m}$. What will be the electric field intensity at a distance 3R ?
The logic function implemented by following 4:1 MUX is
Characteristic impedance of a two-wire transmission line at 10KHz is 200-j50 ohms. Line is terminated in its characteristic impedance, and a 28.28V p-p signal is measured at its input. Determine the real power supplied by the signal source to the line?
Which is the correct waveform across capacitor in the following circuit?
Input voltage applied to a circuit is 1V rms and the output is 1mV rms. Net gain of the circuit is: