Electronics And Communication Engineering (EC) : Mock Test 5 For GATE


65 Questions MCQ Test Mock Tests Electronics & Communication Engineering GATE 2020 | Electronics And Communication Engineering (EC) : Mock Test 5 For GATE


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This mock test of Electronics And Communication Engineering (EC) : Mock Test 5 For GATE for Electronics and Communication Engineering (ECE) helps you for every Electronics and Communication Engineering (ECE) entrance exam. This contains 65 Multiple Choice Questions for Electronics and Communication Engineering (ECE) Electronics And Communication Engineering (EC) : Mock Test 5 For GATE (mcq) to study with solutions a complete question bank. The solved questions answers in this Electronics And Communication Engineering (EC) : Mock Test 5 For GATE quiz give you a good mix of easy questions and tough questions. Electronics and Communication Engineering (ECE) students definitely take this Electronics And Communication Engineering (EC) : Mock Test 5 For GATE exercise for a better result in the exam. You can find other Electronics And Communication Engineering (EC) : Mock Test 5 For GATE extra questions, long questions & short questions for Electronics and Communication Engineering (ECE) on EduRev as well by searching above.
QUESTION: 1

Question 1 to 5 carry One Mark each

Q.

According to the weather______it is going to be cloudly today

Solution:
QUESTION: 2

What is the unit digit in

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QUESTION: 3

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

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QUESTION: 4

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

Ostrich : Bird

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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?

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QUESTION: 6

Question 6 to 10 carry Two Marks each

Q.

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

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QUESTION: 7

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

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QUESTION: 8

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

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QUESTION: 9

The value of X in the following figure is

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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 ?

Solution:
*Answer can only contain numeric values
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 ________________


Solution:

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

Solution:

*Answer can only contain numeric values
QUESTION: 13

Question 11 to 35 carry One Mark each

Q.

 Value of a is ____________


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QUESTION: 14

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

Solution:

 

 

*Answer can only contain numeric values
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 ______________.


Solution:

*Answer can only contain numeric values
QUESTION: 16

The value of current I1 is

____________________


Solution:

*Answer can only contain numeric values
QUESTION: 17

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


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QUESTION: 18

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

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QUESTION: 19

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

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QUESTION: 20

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

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QUESTION: 21

Laplace transform analysis helps in

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QUESTION: 22

Which one is not an advant age of SSB over AM

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QUESTION: 23

Flash ADC is

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QUESTION: 24

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

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QUESTION: 25

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

 

wave is po larized in

Solution:

 

*Answer can only contain numeric values
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 ______________


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QUESTION: 27

The figure shows a dependent current source.It

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QUESTION: 28

The Laplace transformation of eat cosh(bt) is

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QUESTION: 29

The power factor for the circuit shown is

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QUESTION: 30

Consider the transistor circuit shown below

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

Solution:

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.

Solution:

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.

Solution:

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

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)

Solution:

QUESTION: 34

Consider the following model of a JFET amplifier

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

Solution:

QUESTION: 35

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

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QUESTION: 36

For the shown circuit below the output volt age Vo is

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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

Solution:

*Answer can only contain numeric values
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.

_______________


Solution:

*Answer can only contain numeric values
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.

_________________


Solution:

*Answer can only contain numeric values
QUESTION: 40

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


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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.

Solution:

QUESTION: 42

The solution of the differential equation, 

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QUESTION: 43

Consider the circuit shown in figure

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

Solution:

QUESTION: 44

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

Solution:

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
QUESTION: 45

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


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QUESTION: 46

Signal x(t) shown below can be represented as

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QUESTION: 47

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

Solution:

 

QUESTION: 48

The mininized version of logic circuit shown in figure below is

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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

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QUESTION: 50

Find the current I for the circuit shown below

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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.

 

Solution:

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  

Solution:

 

QUESTION: 53

The Y parameter of the two port network shown below is

Solution:

QUESTION: 54

Consider a transistor circuit the value of 

Solution:
QUESTION: 55

Consider a periodic signal x(t) shown below

It has Fourier ser ies representation

Choose the true statement.

Solution:

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

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

Solution:

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

Solution:

*Answer can only contain numeric values
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)


Solution:

QUESTION: 59

Value of  

Solution:

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

Solution:

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

Solution:

QUESTION: 62

Find C/R of system shown in figure below

Solution:

QUESTION: 63

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

Solution:

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

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QUESTION: 65

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

Solution: