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).
Two ideal quantizers A and B have following specifications:
A: 5 bit Quantizer with input dynamic range of -1V to +1V with Q1 as quantization noise power
B: 8 bit Quantizer with input dynamic range of -0.5V to +0.5V with Q2 as quantization noise power.
Then Q1/Q2 will be
The divergence of magnetic field intensity is
A UART is configured to transmit 8 bit data, 1 start bit and 1 stop bit. The serial data output is observed on oscilloscope, which looks like a square wave with frequency of 9600 Hz. What is the baud rate and transmitted data?
A transmission line having characteristic impedance of 50ohms has to deliver 10KW power at 100KHz to a load. Maximum permissible value of rms current anywhere along the line is 20A. What is the maximum VSWR that can be tolerated on this line?
Routh Hurwitz criterion is used to determine
The decoding circuit shown in the figure is has been used to generate active low chip select signal of memory interfaced to 8 bit microprocessor with 16 bit address bus. What is address range and size of memory?
If the waveguide cross-section of a square waveguide with TE11 propagation mode is gradually deformed into a circle, then the corresponding circular waveguide mode will be:
What could be the output current rating of following shunt regulator?
An FM-CW (Frequency Modulated - Continuous Wave) Radar is essentially
The flux in a magnetic core is sinusoidally varying at 200 Hz. The maximum flux density is 2 Tesla and eddy current loss is 15 W. If the frequency is raised to 400 Hz and maximum flux density reduced to 1 Tesla, the eddy current loss will
The electric field intensity E and magnetic field intensity H are coupled and propagating in free space in x and y direction respectively, the Poynting vector is given by
If x and y are two random signals with zero mean Gaussian distribution having identical standard deviation, the phase angle between them is
The current flowing through a capacitor in an AC circuit is:
Which of the following is the Boolean function for Majority Voting, assuming A,B,C are inputs and Y is output?
For broadside antenna array, the largest possible spacing between the antenna elements without any grating lobes is
For the 8085 assembly language program given below, the content of the accumulator after the execution of the program is
3000 MVI A, 45H
3002 MOV B, A
3003 STC
3004 CMC
3005 RAR
3006 XRA B
Conduction angle of a Class AB amplifier is:
For non dispersive medium
Schottky clamping is resorted in TTL gates
At cut-off frequency, the phase velocity of a waveguide is
Zener diode, when used in voltage stabilization circuits, is biased in
The closed loop frequency response of a dc-dc converter is shown in following figure. What are the gain and phase margins?
If for a silicon npn transistor, the base-to-emitter voltage (VBE) is 0.7V and the collector-to-base voltage (VCB) is 0.2 V, then the transistor is operating in the
3 port Circulator is
An 8 bit ripple counter and an 8 bit synchronous counter are made using flip flops having a propagation delay of 10 ns each. If the worst case delay in the ripple counter and the synchronous counter be R and S respectively, then