Practice Test: Electronics Engineering (ECE)- 6 - Electronics and Communication Engineering (ECE)


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65 Questions MCQ Test GATE ECE (Electronics) 2024 Mock Test Series - Practice Test: Electronics Engineering (ECE)- 6

Practice Test: Electronics Engineering (ECE)- 6 for Electronics and Communication Engineering (ECE) 2023 is part of GATE ECE (Electronics) 2024 Mock Test Series preparation. The Practice Test: Electronics Engineering (ECE)- 6 questions and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus.The Practice Test: Electronics Engineering (ECE)- 6 MCQs are made for Electronics and Communication Engineering (ECE) 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Practice Test: Electronics Engineering (ECE)- 6 below.
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Practice Test: Electronics Engineering (ECE)- 6 - Question 1

Question 1 to 5 carry One Mark each

Q.

According to the weather______it is going to be cloudly today

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 1

According to the weather forecast it is going to be cloudly today

Practice Test: Electronics Engineering (ECE)- 6 - Question 2

What is the unit digit in

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 2

Practice Test: Electronics Engineering (ECE)- 6 - Question 3

In the following questions, a sentence has been given in direct/indirect speech.
She said, “Let them play”.

Practice Test: Electronics Engineering (ECE)- 6 - Question 4

Select the pair that best express a relationship similar to the one expressed in the question pair:

Ostrich : Bird

Practice Test: Electronics Engineering (ECE)- 6 - Question 5

A and B together can do a piece of work in 12 days, which B and C together can do in 16 days. After A has
been working it for 5 days and B for 7 days, C finishes it in 13 days. In how many days C alone will do the
work?

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 5

Practice Test: Electronics Engineering (ECE)- 6 - Question 6

Question 6 to 10 carry Two Marks each

Q.

The sufficient condition for matrix ‘A’ to be diagonalizable is

Practice Test: Electronics Engineering (ECE)- 6 - Question 7

If x = ya , y = zb and z = xc then abc = ?

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 7

Practice Test: Electronics Engineering (ECE)- 6 - Question 8

Out of the four alternatives suggested select the one which is correct

Practice Test: Electronics Engineering (ECE)- 6 - Question 9

The value of X in the following figure is

Practice Test: Electronics Engineering (ECE)- 6 - Question 10

The piechart shows the distribution of New York market share by volume of different computer companies
in 2005.

Number of units sold in 2005 in New York = 1,500
Value of units sold in 2005 in New York = US$ 16,50,000

 

For the year 2005, which company has realised the lowest average unit sales price for a PC ?

*Answer can only contain numeric values
Practice Test: Electronics Engineering (ECE)- 6 - Question 11

If for a 2 × 2 matrix a11 = a12 = a21 = 1 and a22 = –1. If the eigen values of A19 can be written in the
form then value of a × b is ________________


Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 11

Practice Test: Electronics Engineering (ECE)- 6 - Question 12

If X(t ) is random procoss defined as
X(t ) = A + Y (t ) where Y(t ) is zero mean random process and Auto-correlation function of X(t) is defined as

Value of C will be, If A, C are constant

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 12

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Practice Test: Electronics Engineering (ECE)- 6 - Question 13

Question 11 to 35 carry One Mark each

Q.

 Value of a is ____________


Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 13

Practice Test: Electronics Engineering (ECE)- 6 - Question 14

ii is of the form, where (i= sqrt {-1})

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 14

 

 

*Answer can only contain numeric values
Practice Test: Electronics Engineering (ECE)- 6 - Question 15

6 boys and 6 girls sit in a row randomly. The probability that all the six girls sit together is in the form 1/a. Value of a is ______________.


Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 15

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Practice Test: Electronics Engineering (ECE)- 6 - Question 16

The value of current I1 is

____________________


Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 16

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Practice Test: Electronics Engineering (ECE)- 6 - Question 17

For a unity feedback system whose open - loop transfer function is   the velocity error is _________________


Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 17

Practice Test: Electronics Engineering (ECE)- 6 - Question 18

First derivative of th e signal x(t ) will be

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 18

Practice Test: Electronics Engineering (ECE)- 6 - Question 19

Which unit is adopted for magnit ude measurement in Bode plot s.

Practice Test: Electronics Engineering (ECE)- 6 - Question 20

Aliasing occurs when sampling frequency ωs where ωm is message frequency?

Practice Test: Electronics Engineering (ECE)- 6 - Question 21

Laplace transform analysis helps in

Practice Test: Electronics Engineering (ECE)- 6 - Question 22

Which one is not an advant age of SSB over AM

Practice Test: Electronics Engineering (ECE)- 6 - Question 23

Flash ADC is

Practice Test: Electronics Engineering (ECE)- 6 - Question 24

In the common base stage of figure. ICQ = 1mA and β = 7.5 T he input Resistance is

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 24

Practice Test: Electronics Engineering (ECE)- 6 - Question 25

Magnetic field component of a plane wav e in a lossless dielectric is given as

 

wave is po larized in

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 25

 

*Answer can only contain numeric values
Practice Test: Electronics Engineering (ECE)- 6 - Question 26

A 20 MHz uniform plane wave propagate in lossy dielectric medium which amplit ude is reduced by 20%
aft er every meter traveled. Attenuation constant (Np/m) will be ______________


Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 26

Practice Test: Electronics Engineering (ECE)- 6 - Question 27

The figure shows a dependent current source.It

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 27

Practice Test: Electronics Engineering (ECE)- 6 - Question 28

The Laplace transformation of eat cosh(bt) is

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 28

Practice Test: Electronics Engineering (ECE)- 6 - Question 29

The power factor for the circuit shown is

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 29

Practice Test: Electronics Engineering (ECE)- 6 - Question 30

Consider the transistor circuit shown below

The average power dissipated for one cycle of operation is given by

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 30

Practice Test: Electronics Engineering (ECE)- 6 - Question 31

Common Data Questi on s 29 to 30

Q.

Two amplifiers A and B are to be connectd in cascade. Find out the order in which the amplifiers must be connected to minimise the noise. Amplifiers A has noise factor of 1.5, gain of 10 dB and amplifier B has noise figure 2 dB, gain of 15 dB.

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 31

Practice Test: Electronics Engineering (ECE)- 6 - Question 32

Determine the equivalent noise temperat ure of bot h the amplifiers assuming the reference temperature of
20°C and compare with that of cascaded amlifier.

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 32

Sol. To = 20 + 273 = 293
Te = (F – 1)T o = (2.01 – 1) × 293 = 296 K

Practice Test: Electronics Engineering (ECE)- 6 - Question 33

The JFET in the circuit shown in figure has IDSS = 10 mA and VP = –5V and the value of resistance.
RS for drain current IDS = 6.4 mA (nearest answer)

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 33

Practice Test: Electronics Engineering (ECE)- 6 - Question 34

Consider the following model of a JFET amplifier

Here IDSS = 8mA & VP = –4V the value of VDS will be

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 34

Practice Test: Electronics Engineering (ECE)- 6 - Question 35

Content of memory location 2070H aft er executing instruction LDAX D is

Practice Test: Electronics Engineering (ECE)- 6 - Question 36

For the shown circuit below the output volt age Vo is

Practice Test: Electronics Engineering (ECE)- 6 - Question 37

A Si sample doped with 1018 /cm3 donar impurit y has a resistance of 10. T he sample has an area of
10–6 cm2  a length of 10 μm. T he doping efficiency of the sample is

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 37

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Practice Test: Electronics Engineering (ECE)- 6 - Question 38

Question 36 to 65 carry Two Marks each

Q.

The value of   where R is the region in the first quadrant bounded by the curve y = x2 ,
y + x = 2 and x = 0.

_______________


Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 38

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Practice Test: Electronics Engineering (ECE)- 6 - Question 39

For  we have y = 1 at x = 0. By using Euler method and taking the step size 0.1. Find the value
of y at x = 0.4.

_________________


Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 39

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Practice Test: Electronics Engineering (ECE)- 6 - Question 40

If x + y = k is normal to y2 = 12x, t hen k is ___________


Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 40

Practice Test: Electronics Engineering (ECE)- 6 - Question 41

Determ ine the ran ge of k such that fee dback cont rol system hav ing char acteristic equation
s ( s2 + s + 1) (s + 4) + k = 0 will be stable.

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 41

Practice Test: Electronics Engineering (ECE)- 6 - Question 42

The solution of the differential equation, 

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 42

Practice Test: Electronics Engineering (ECE)- 6 - Question 43

Consider the circuit shown in figure

if 4R2C = 3L, t he reson ance frequency ωo is

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 43

Practice Test: Electronics Engineering (ECE)- 6 - Question 44

What is the transfer funct ion whose approximate plot is shown in figure.

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 44

Corner frequenc ies ar e 2.5 an d 40 rad/sec
20 lo g k = 40 + 20 lo g 2 .5 = 47. 95
k = 250.

*Answer can only contain numeric values
Practice Test: Electronics Engineering (ECE)- 6 - Question 45

For a unity feedback system with G(s) = 10/s2, what would be t he value of centroid


Practice Test: Electronics Engineering (ECE)- 6 - Question 46

Signal x(t) shown below can be represented as

Practice Test: Electronics Engineering (ECE)- 6 - Question 47

If memory chip size is 256 × 1 bits, the n umber of chips required for 1 KB memory is

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 47

 

Practice Test: Electronics Engineering (ECE)- 6 - Question 48

The mininized version of logic circuit shown in figure below is

Practice Test: Electronics Engineering (ECE)- 6 - Question 49

A man enters into tunnel with velocity v of width 7m and height 4 m and listen th e news through AM
radio signal. Whe n he travels in the tunnel, news spread about bad weather. Select t he correct opt ion
given below

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 49

Practice Test: Electronics Engineering (ECE)- 6 - Question 50

Find the current I for the circuit shown below

Practice Test: Electronics Engineering (ECE)- 6 - Question 51

Consider an AM system with additive thermal noise having a PSD  η/2 = 10–12 W/MHz. Assuming that
baseband message signal x(t) has a bandwidth of 4 KHz and the amplitude distribution shown in figure below.

The signal is demodulated by envelope detection and appropriate post detect ion filtering assume M = 1. Find the minimum value of carrier amplitude Ac that will yield (S/No)  40 dB.

 

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 51

Practice Test: Electronics Engineering (ECE)- 6 - Question 52

Three lossless quart er wave transformer is connected as shown in figure

Which is the necessary condition for no reflection at the input if  

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 52

 

Practice Test: Electronics Engineering (ECE)- 6 - Question 53

The Y parameter of the two port network shown below is

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 53

Practice Test: Electronics Engineering (ECE)- 6 - Question 54

Consider a transistor circuit the value of 

Practice Test: Electronics Engineering (ECE)- 6 - Question 55

Consider a periodic signal x(t) shown below

It has Fourier ser ies representation

Choose the true statement.

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 55

x(t) is odd + halfwave symmetry.
So only odd terms will come in to the picture.

Practice Test: Electronics Engineering (ECE)- 6 - Question 56

The electric field strength at distant point, P, due to a point charge, +q, located at the origin, is 100 µ V/m. If the point charge is now enclosed by a perfectly conducting metal sheet sphere whose center is at the origin, then the electric field strength at the point, P, outside the sphere, becomes

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 56

Practice Test: Electronics Engineering (ECE)- 6 - Question 57

For particular. semiconductor material following parameter are observed.

hese parameters are independent of temperature the measure conductivit y of the intrinsic material is 

 The conductivit y at T = 500 K is

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 57

*Answer can only contain numeric values
Practice Test: Electronics Engineering (ECE)- 6 - Question 58

Two point charge 1 μC and 4 μC are placed at (–2, 1, 5) and (1, 3, –1) respectively. The energy stored
in the field will be (in mJ)


Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 58

Practice Test: Electronics Engineering (ECE)- 6 - Question 59

Value of  

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 59

Practice Test: Electronics Engineering (ECE)- 6 - Question 60

If maximum power transfer will take place in the circuit at   then maximum power transfer to the
load will be

where ZL = R + jX

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 60

Practice Test: Electronics Engineering (ECE)- 6 - Question 61

Power spectral density of random process x(t) is shown in figure below. It consist of delta funct ion at f = 0
and triangular component . Mean square value of X(t ) is

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 61

Practice Test: Electronics Engineering (ECE)- 6 - Question 62

Find C/R of system shown in figure below

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 62

Practice Test: Electronics Engineering (ECE)- 6 - Question 63

Which of the following is correct signal space diagram (constellation diagram) for the unipolar return to zero code.

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 63

Practice Test: Electronics Engineering (ECE)- 6 - Question 64

For the patterns shown in figure (i) and (ii) if the frequency applied to horizont al plate is 50 Hz t hen,
the frequencies of the vert ical plates will be respectively

Practice Test: Electronics Engineering (ECE)- 6 - Question 65

A series RL circuit has a constant voltage ‘V’ applied at t = 0. A t what time VR = VL

Detailed Solution for Practice Test: Electronics Engineering (ECE)- 6 - Question 65

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