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GATE 2019: SEMI SYLLABUS QUIZ 2
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Question 1
The virtual ground concept in an op-amp circuit is valid only under
Question 2
A finite state machine is given below
Here, X, Y are inputs and A is output. The state machine is
Here, X, Y are inputs and A is output. The state machine is
Question 3
The logic circuit given below is used to generate chip select signal by INTEL 8085 microprocessor to address a peripheral. The peripheral will respond address in the range.
Question 4
A 16 Kb (=16,384 bit) memory array is designed as a square with an aspect ratio of one (number of rows is equal to the number of columns). The minimum number of address lines needed for the row decoder is __________ .
Question 5
The signal x(t) = 2cos40
t+sin60
t is sampled at 75 Hz. The number of full periods of x(t) to obtain one period of sampled signal x(n) is_________?
t+sin60t is sampled at 75 Hz. The number of full periods of x(t) to obtain one period of sampled signal x(n) is_________? Question 6
Calculate the value of feedback resistance (Rf) with R1 = 20 KΩ, R2 = 10KΩ, Vo = 15V, Vi = 10V as given in the figure _____ (KΩ)
Question 7
A Si transistor with VBE(sat) = 0.8 V, β = hfe = 100, VCE(sat) = 0.2V is used in the circuit shown. Find the minimum value of RC in kilohm for which the transistor remains in saturation.
Question 8
Designing BCD(ABCD) to 9’s compliment BCD(PQRS) what is the expression for ‘Q’.
Q 
Question 9
Consider the synchronous sequential circuit given below
If the initial state of the circuit Q1 Q0 is ‘11’ then minimum number of clock pulses required to get Q1 Q0 as ‘11’ again are ______.
If the initial state of the circuit Q1 Q0 is ‘11’ then minimum number of clock pulses required to get Q1 Q0 as ‘11’ again are ______.
Question 10
Consider the following 8085 microprocessor assembly language program.
1- LX l SP, 0200 H
2- LX l B, 1028 H
3- LXl H, 42FF H
4- PUSS H
5- LXl D, 20FE H
6- DAD B
7- X CHG
8- DAD D
9- HLT
After execution above program content of HL register pair is_________ hex.
1- LX l SP, 0200 H
2- LX l B, 1028 H
3- LXl H, 42FF H
4- PUSS H
5- LXl D, 20FE H
6- DAD B
7- X CHG
8- DAD D
9- HLT
After execution above program content of HL register pair is_________ hex.
Question 11
A plane wave propagating in free space with electric field
V/m
Is incident on a dielectric slab
with 
The angle of transmission is
V/m Is incident on a dielectric slab
with The angle of transmission is Question 12
A 1 cm
2.5cm rectangle wave guide filled with a lossless dielectric material 
is excited at a frequency 
,where 
is the cut off frequency of the guide. If the guide operates in TE10 mode, then the distance along the guide at which the signal strength decreases to 1 percent of the excitation is given by _______cm.
2.5cm rectangle wave guide filled with a lossless dielectric material is excited at a frequency ,where is the cut off frequency of the guide. If the guide operates in TE10 mode, then the distance along the guide at which the signal strength decreases to 1 percent of the excitation is given by _______cm. Question 13
Consider a communication scheme where the binary valued signal X satisfies 
The received signal Y = X + Z, where Z is a Gaussian random variable with zero mean and variance 
The received signal Y is fed to the threshold detector. The output of the threshold detector 
To achieve a minimum probability of error
the threshold 
should be
The received signal Y = X + Z, where Z is a Gaussian random variable with zero mean and variance The received signal Y is fed to the threshold detector. The output of the threshold detector To achieve a minimum probability of error
the threshold should be Question 14
The bandwidth of the picture (video) signal in a television is_______ MHz. The following are the available data:
(i) Number of distinguishable brightness level=10.
(ii) The number of elements per picture frame=300,000.
(iii) Picture frames transmitted per second=30.
(iv) S/N required=30 dB.
(i) Number of distinguishable brightness level=10.
(ii) The number of elements per picture frame=300,000.
(iii) Picture frames transmitted per second=30.
(iv) S/N required=30 dB.
Question 15
A single tone modulating signal, frequency modulates a carrier of 15 MHz and produces a frequency deviation of 75 kHz. If the frequency sensitivity is assumed to be 12 kHz/V then the amplitude and frequency of modulating signal is (Assume bandwidth =175 kHz
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