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Sample GATE Mock Test - Electronics & Communication (EC)


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65 Questions MCQ Test | Sample GATE Mock Test - Electronics & Communication (EC)

Sample GATE Mock Test - Electronics & Communication (EC) for GATE 2023 is part of GATE preparation. The Sample GATE Mock Test - Electronics & Communication (EC) questions and answers have been prepared according to the GATE exam syllabus.The Sample GATE Mock Test - Electronics & Communication (EC) MCQs are made for GATE 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Sample GATE Mock Test - Electronics & Communication (EC) below.
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Sample GATE Mock Test - Electronics & Communication (EC) - Question 1

Question 1 to 5 carry One Mark each

Q.

Even as the ________else where in the world are struggling, to come out of recession, Indian consumers are splurging on consumer goods and to ____________this growth, companies are investing heavily in various sectors.

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 1

As we can say that ,
The correct word is filled in the above given sentence :-
Even as the economies elsewhere in the world are struggling to come out of recession, Indian consumers are splurging on consumer goods and to meet this growth, companies are investing heavily in various sectors.
Therefore , option A will be required word .

Sample GATE Mock Test - Electronics & Communication (EC) - Question 2

In the olympic games, the flags of six nations were flown on the masts in the following way. The flag of
America was to the left of Indian tricolor and to the right of the flag of france. The flag of Australia was on
the right of the Indian flag but was to the left of the flag of Japan, which was to the left of the flag of China.
The two flags which are in the centre is

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 2

India and Australia
[France – America – India –Aus –Japan – China]

Sample GATE Mock Test - Electronics & Communication (EC) - Question 3

From the given equilateral triangle below A, B and C run along the sides in clock-wise direction and stop after coming (1{1over 2}) sides. Which of the following statements is true?

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 3

Sample GATE Mock Test - Electronics & Communication (EC) - Question 4

In the following questions, a sent ence has been given in direct/indirect speech.
Nitin said to me, “why don’t you come with us? why do you want to be so unsocial.

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 4

 

Nitin asked me why I did not come with them. He further asked why I wanted to be so unsocial.

Sample GATE Mock Test - Electronics & Communication (EC) - Question 5

Spotting the error

In order to transfer (a)/ branch licenses for one (b)/ bank to anot her you require special approval from RBI
(c)/ No error (d).

Sample GATE Mock Test - Electronics & Communication (EC) - Question 6

Question 6 to 10 carry Two Marks each

Q.

In an NGO, the daily average wages of 20 illiterate employee is decreased from Rs. 25 to Rs. 10. Thus the
average salary of all the literate (educated) and illiterate employees is decreased by Rs. 10 perday. The
number of educated employees working in the NGO is

Sample GATE Mock Test - Electronics & Communication (EC) - Question 7

Answer the question with the help of the following table

Q.

The ratio of the percentage share of Dairy Milk to that of other is

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 7

Sample GATE Mock Test - Electronics & Communication (EC) - Question 8

Answer the question with the help of the following table

Q.

If in the next year, Crackle and Dairy Mill decided to join hands and increase their market share from their
combined existing share by 20%. What will be their combined production if the mark size remains the same?

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 8

Sample GATE Mock Test - Electronics & Communication (EC) - Question 9

Simple interest on a certain amount is 9/16  of the principle. If the number representing the rate of intersest in percent and time in years be equal. Then time, for when the principal is lent out is,

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 9

Sample GATE Mock Test - Electronics & Communication (EC) - Question 10

If A is a square matrix of order 3 and |A| =1/2. The A (adj(A)) is

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 10

Sample GATE Mock Test - Electronics & Communication (EC) - Question 11

Question 11 to 35 carry One Mark each

Q.

If the probability for A to fail in an examination is 0.2 and that for B is 0.3, then the probability that either A or B fails is

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 11

Sample GATE Mock Test - Electronics & Communication (EC) - Question 12

Eigen value of unit ary matrix are always

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 12

The eigen value of unitary matrix are always of unit modulus

Sample GATE Mock Test - Electronics & Communication (EC) - Question 13

The linear approximat ion of e–x in the neighbourhood of x = 2 is

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 13

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Sample GATE Mock Test - Electronics & Communication (EC) - Question 14

If   , then the value of  is


Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 14

Sample GATE Mock Test - Electronics & Communication (EC) - Question 15

State equation of a cont rol system is given by

T he state transition matrix is .

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 15

Sample GATE Mock Test - Electronics & Communication (EC) - Question 16

Find the value of 'k' and 'a' to satisfy the frequency domain specification Mr = 1.04 and ωr = 11.55 rad/sec is

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 16

Sample GATE Mock Test - Electronics & Communication (EC) - Question 17

The current waveform across a 8H inductor is

The voltage wareform is

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 17

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Sample GATE Mock Test - Electronics & Communication (EC) - Question 18

For the circuit shown in figure diode cut in voltage is Vin = 0. T he Ripple voltage to not more than Vrip= 4V.
The min load resistance(in k), that can be corrected to the output is

____________________


Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 18

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Sample GATE Mock Test - Electronics & Communication (EC) - Question 19

A bidirectional 4-bit shift register is storing the nibble 1101. Its  input is high. The nibble 1011 is waiting to be entered on the serial data-input line. After these clock pulses, the shift register is storing (in binary system) _________________


Sample GATE Mock Test - Electronics & Communication (EC) - Question 20

If ω0 is low, the autocorrelation of function approximately is, where ^ represent
triangle and  

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 20

Sample GATE Mock Test - Electronics & Communication (EC) - Question 21

The hole concentrat ion in P-t ype GaAs is given by

Where L = 10 μm. T he hole diffusion constant is 10cm2/sec. The hole diffusion current density at x = 5 μm
is

Sample GATE Mock Test - Electronics & Communication (EC) - Question 22

A circular conductor of radius r0 = 1 cm has an internal field

Total current in the conductor is

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 22

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Sample GATE Mock Test - Electronics & Communication (EC) - Question 23

A video transmission system transmits 625 picture frames per second each frame consist of 400 x 400 pixel grid
with 64 intensity levels per pixel. The data rate (in Gbps) of the system is

__________________


Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 23

Rate = 625 × 4002 × 64 = 6.4 Gbps

*Answer can only contain numeric values
Sample GATE Mock Test - Electronics & Communication (EC) - Question 24

The volt age vba in the circuit given below is

_________________

 


Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 24

 

*Answer can only contain numeric values
Sample GATE Mock Test - Electronics & Communication (EC) - Question 25

The common base amplifier is drawn as a two port in figure. The parameter are β= 100, gm = 3mS, r0= 800 k The h parameter h21 is

______________


Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 25

Sample GATE Mock Test - Electronics & Communication (EC) - Question 26

Impulse response of ZOH (zero order hold circuit) shown

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 26

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Sample GATE Mock Test - Electronics & Communication (EC) - Question 27

Determine the equivalent noise temperature of both the amplifiers assuming the refference temperature of
20°C and compare with that of cascaded amlifier.

__________________


Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 27

To = 20 + 273 = 293
Te = (F – 1)To = (1.6 – 1) × 293 = 296 K

Sample GATE Mock Test - Electronics & Communication (EC) - Question 28

If the phase angle at gain crossover frequency is estimated to be –105°. What will be the value of phase
margin of the system?

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 28

If the phase angle at gain crossover frequency is estimated to be –105°. 75° will be the value of phase
margin of the system

Sample GATE Mock Test - Electronics & Communication (EC) - Question 29

Two identical co-axial circular coil carry the same current I but in opposite direction. The magnitude of
magnetic field B at a point on the axis midway between the coil is

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 29

Sample GATE Mock Test - Electronics & Communication (EC) - Question 30

The Phase and gain margin margins of the system shown in figure where k = 10 is

Sample GATE Mock Test - Electronics & Communication (EC) - Question 31

A feedback control system has an open loop transfer function of

Determine the range of k for the closed loop stability.

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 31

Sample GATE Mock Test - Electronics & Communication (EC) - Question 32

The signal X(t) is

The signal  will be

Sample GATE Mock Test - Electronics & Communication (EC) - Question 33

The 8–input XOR circuit shown has an output of y = 1. Which input combination below (ordered A-H) is
correct?

Sample GATE Mock Test - Electronics & Communication (EC) - Question 34

A charge Q1 is placed in charge free region at point (1, 3, –2) and work done corresponding to place
the charge is W1. After placing the charge Q1, charge Q2 is placed at (2, 3, –1) and corresponding work
done is W2.
Select the correct option given below

Sample GATE Mock Test - Electronics & Communication (EC) - Question 35

Consider the output characteristics as shown below  and for line IB = 20 μA

is   T he correct relationship between  

 

*Answer can only contain numeric values
Sample GATE Mock Test - Electronics & Communication (EC) - Question 36

Question 36 to 65 carry Two Marks each

Q.

The modulus part of (1 + i)8 is _______________


Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 36

Sample GATE Mock Test - Electronics & Communication (EC) - Question 37

The node voltage V1 and V2 of the given circuit is

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 37

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Sample GATE Mock Test - Electronics & Communication (EC) - Question 38

Given that continuous time filter transfer function  is convert ed to discrete time filter
with transfer function    both filters are same at sampling frequency of fs =

_______________ Hz.


Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 38

Sample GATE Mock Test - Electronics & Communication (EC) - Question 39

The NMOS transistor has   If ID = 0.4 mA & VD = 0.5V. The values of RD and RS are respectively

 

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 39

 

*Answer can only contain numeric values
Sample GATE Mock Test - Electronics & Communication (EC) - Question 40

Consider the n-MOS common gate circuit. The parameter  gm = 2mS & ro= ∞ The voltage gain AV is

____________________


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Sample GATE Mock Test - Electronics & Communication (EC) - Question 41

For the channel and message probabilities given in figure below. Find the probability of error.

 


Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 41

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Sample GATE Mock Test - Electronics & Communication (EC) - Question 42

A DSB-SC modulated signal   is corrupted by an additive white Gaussian noise of power 10–4 W/Hz. The PSD of message signal is shown in figure below and   is uniformly distributed over the range 0 to 2π.

Find the power ratio of modulated signal and the noise power in transmitted BW (in dB).


Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 42

 

Sample GATE Mock Test - Electronics & Communication (EC) - Question 43

f(x, y, z) = xy2 + yz3, the directional derivative of f(x ,y, z) at the point (2, –1, 1) in the direction of vector

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 43

Sample GATE Mock Test - Electronics & Communication (EC) - Question 44

If a vector   is defined as  The divergence of vector is

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 44

Sample GATE Mock Test - Electronics & Communication (EC) - Question 45

The thevenin equivalent of the given circuit cross AB is

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 45

Sample GATE Mock Test - Electronics & Communication (EC) - Question 46

How many times loop will excess?

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 46

Loop execute if Z = 1 (Set)
0 time loop will be execute

*Answer can only contain numeric values
Sample GATE Mock Test - Electronics & Communication (EC) - Question 47

For the figure shown below the capacitance from bot tom of n-type region to the substrate and capacitance
from side walls of the isolation islands to p+ region are 0.2 pF and 0.06 pF. The parasitic capacitance is

 

______________


Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 47

The parasitics capacitance is the sum of two componants.
CTS = C1 + C2 = 0.2 pF + 0.06 pF
= 0.26 pF

*Answer can only contain numeric values
Sample GATE Mock Test - Electronics & Communication (EC) - Question 48

An ideal a band-pass channel 500 Hz – 2000 Hz is deployed for communication. A modem is designed to
transmit bits at the rate of 6800 bps using 32 QAM. The roll-off factor of a pulse with a raised cosine
spectram that utilizes the entire frequency band is


Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 48

*Answer can only contain numeric values
Sample GATE Mock Test - Electronics & Communication (EC) - Question 49

Using Simpson’s 1/3rd rule with step size of 0.1, the value of  is___________


Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 49

Sample GATE Mock Test - Electronics & Communication (EC) - Question 50

The direct form structure of an FIR filter is shown in figure below

The filter can be used to approximate a

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 50

LPF because except zero all other low frequencies
allowed.

Sample GATE Mock Test - Electronics & Communication (EC) - Question 51

A function   number of prime implicants and minimized expression is

Sample GATE Mock Test - Electronics & Communication (EC) - Question 52

Consider the circuit shown given below. The transfer characteristics of circuit is repersented as a

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 52

Sample GATE Mock Test - Electronics & Communication (EC) - Question 53

A unity feedback control system whose open-loop transfer function is  The rise time and settling time for tolerance 2% respectively

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 53

Sample GATE Mock Test - Electronics & Communication (EC) - Question 54

The peak value of the output of the filter if the input pulse to the filter is shown below

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 54

 

Sample GATE Mock Test - Electronics & Communication (EC) - Question 55

The solution of the differential equation   

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 55

Sample GATE Mock Test - Electronics & Communication (EC) - Question 56

The transfer characteristics of an FET is given by the parabola IDS = 10 (VGS + 1)2. If the input is
5cosωot. then variation of gm with time is given by

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 56

Sample GATE Mock Test - Electronics & Communication (EC) - Question 57

The following signal pair are defined below

*Answer can only contain numeric values
Sample GATE Mock Test - Electronics & Communication (EC) - Question 58

In a reverse biased abrupt p-n junction doping concentration NA = 9 ×1016/cm3 and ND = 1 × 1016/cm3
respectively. In p-n junction total depletion layer width 3 μm. The depletion width on p–side is


*Answer can only contain numeric values
Sample GATE Mock Test - Electronics & Communication (EC) - Question 59

In the circuit shown below OP-AMP is ideal. The total current (in mA) supplied by 20V voltage supply is
(Assume β of transistor very large)

________________


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Sample GATE Mock Test - Electronics & Communication (EC) - Question 60

A straight conductor AB is moving with velocity 8 m/s in the uniform magnetic field  

Power dissipated by conductor AB whose resistance is 20 will be


Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 60

 

Sample GATE Mock Test - Electronics & Communication (EC) - Question 61

Consider the given circuit & waveform for the input diode (cut in voltage Vx= 0)

The waveform of output Vo is

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 61

Sample GATE Mock Test - Electronics & Communication (EC) - Question 62

What is the PSD of signal y(t ) = x(t) – x(t – T), where SX (f) represent PSD of x(t).

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 62

Sample GATE Mock Test - Electronics & Communication (EC) - Question 63

Find the transfer function of the system whose asymptotic approximation is given in figure below, is

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 63

Sample GATE Mock Test - Electronics & Communication (EC) - Question 64

The Fourier transform of the signal

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 64

Sample GATE Mock Test - Electronics & Communication (EC) - Question 65

The current i at t = 5sec in the circuit given is

__________________ A

Detailed Solution for Sample GATE Mock Test - Electronics & Communication (EC) - Question 65

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