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Sample GATE Mock Test - Electronics & Communication (EC)

65 Questions MCQ Test GATE ECE (Electronics) 2022 Mock Test Series | Sample GATE Mock Test - Electronics & Communication (EC)

Description

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

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.

A.
economies, meet
B.
countries, inhibit
C.
governments, measure
D.
nations, inflict

Solution:

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

A.
India and Australia
B.
America and India
C.
Japan and Australia
D.
America and Australia

Solution:

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

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?

A.
B is to the west of C
B.
A is to the S-W of B
C.
B is to the N-W of A
D.
C is to the N-E of A

Solution:

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.

A.
Nitin asked me why I did not come with them. He further asked why he wanted to be so unsocial
B.
Nitin asked me why he did not come with them. He further asked why I wanted to be so unsocial.
C.
Nitin asked me why I did not come with them. He further asked why I wanted to be so unsocial.
D.
Nitin asked me why you did not come with them. He further asked why I wanted to be so unsocial

Solution:

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).

A.
a
B.
b
C.
c
D.
d

Solution:

QUESTION: 6

Question 6 to 10 carry Two Marks each

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

A.
15
B.
20
C.
10
D.
25

Solution:

QUESTION: 7

Answer the question with the help of the following table

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

A.
4.5
B.
4.0
C.
3.5
D.
3.25

Solution:

QUESTION: 8

Answer the question with the help of the following table

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?

A.
26251
B.
28520
C.
31780
D.
Indeterminable

Solution:

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,

A.
6.25 years
B.
7.5 years
C.
7.25 years
D.
7 years

Solution:

QUESTION: 10

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

A.
B.
C.
D.
None

Solution:

QUESTION: 11

Question 11 to 35 carry One Mark each

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

A.
0.5
B.
0.44
C.
0.06
D.
None

Solution:

QUESTION: 12

Eigen value of unit ary matrix are always

A.
real
B.
1
C.
purely imaginary
D.
of unit modulus

Solution:

The eigen value of unitary matrix are always of unit modulus

QUESTION: 13

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

A.
B.
C.
D.
xe^-2 - e^-2

Solution:

*Answer can only contain numeric values

QUESTION: 14

If , then the value of is

Solution:

QUESTION: 15

State equation of a cont rol system is given by

T he state transition matrix is .

Solution:

QUESTION: 16

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

A.
663, 32.55
B.
25.75, 32.55
C.
663, 16.28
D.
25.75, 16.28

Solution:

QUESTION: 17

The current waveform across a 8H inductor is

The voltage wareform is

Solution:

*Answer can only contain numeric values

QUESTION: 18

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

____________________

Solution:

*Answer can only contain numeric values

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) _________________

Solution:

QUESTION: 20

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

A.
B.
C.
D.
None of these

Solution:

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

Solution:

QUESTION: 22

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

Total current in the conductor is

A.
(4/π)A
B.
(8/π)A
C.
4A
D.
8A

Solution:

*Answer can only contain numeric values

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

__________________

Solution:

Rate = 625 × 400² × 64 = 6.4 Gbps

*Answer can only contain numeric values

QUESTION: 24

The volt age v_ba in the circuit given below is

_________________

Solution:

*Answer can only contain numeric values

QUESTION: 25

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

______________

Solution:

QUESTION: 26

Impulse response of ZOH (zero order hold circuit) shown

Solution:

*Answer can only contain numeric values

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.

__________________

Solution:

T_o = 20 + 273 = 293
T_e = (F – 1)T_o = (1.6 – 1) × 293 = 296 K

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?

A.
23°
B.
45°
C.
75°
D.
60°

Solution:

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

A.
Zero
B.
Same as that pr oduced by one coil
C.
Twice that pro duced by one coil
D.
Half that pro duced by one coil

Solution:

QUESTION: 30

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

A.
21°, 16 dB
B.
21°, 8 dB
C.
8 dB, 21°
D.
16°, 21 dB

Solution:

QUESTION: 31

A feedback control system has an open loop transfer function of

Determine the range of k for the closed loop stability.

A.
0<K<2/3
B.
2/3<K<1
C.
0<K<1
D.
2/3<k

Solution:

QUESTION: 32

The signal X(t) is

The signal will be

A.
B.
C.
D.
None of these

Solution:

QUESTION: 33

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

A.
11100111
B.
00011101
C.
10111100
D.
10111000

Solution:

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

Solution:

QUESTION: 35

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

is T he correct relationship between

A.
B.
C.
D.
Both (a) & (b)

Solution:

*Answer can only contain numeric values

QUESTION: 36

Question 36 to 65 carry Two Marks each

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

Solution:

QUESTION: 37

The node voltage V₁ and V₂ of the given circuit is

A.
7.11V, –3.96V
B.
–7.11V, 3.96V
C.
–7.11V, –3.96V
D.
None

Solution:

*Answer can only contain numeric values

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 f_s =

_______________ Hz.

Solution:

QUESTION: 39

The NMOS transistor has If I_D = 0.4 mA & V_D = 0.5V. The values of R_D and R_S are respectively

A.
5 kW, 3.25 kW
B.
3.25 kW, 5 kW
C.
2.5 kW, 6.5 kW
D.
None of these

Solution:

*Answer can only contain numeric values

QUESTION: 40

Consider the n-MOS common gate circuit. The parameter g_m = 2mS & r_o= ∞ The voltage gain A_V is

____________________

Solution:

*Answer can only contain numeric values

QUESTION: 41

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

Solution:

*Answer can only contain numeric values

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).

Solution:

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

Solution:

QUESTION: 44

If a vector is defined as The divergence of vector is

A.
(n + 1)r^n–1
B.
3nr^n–1
C.
(n + 3)rⁿ
D.
(3n + 1)rⁿ

Solution:

QUESTION: 45

The thevenin equivalent of the given circuit cross AB is

A.
17V, 12
B.
12V, 17
C.
18V, 12
D.
12V, 18

Solution:

QUESTION: 46

How many times loop will excess?

A.
0 time
B.
1time
C.
2 times
D.
can’t say

Solution:

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

*Answer can only contain numeric values

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

______________

Solution:

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

*Answer can only contain numeric values

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

Solution:

*Answer can only contain numeric values

QUESTION: 49

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

Solution:

QUESTION: 50

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

The filter can be used to approximate a

A.
LPF
B.
HPF
C.
BPF
D.
Band stop filter

Solution:

LPF because except zero all other low frequencies
allowed.

QUESTION: 51

A function number of prime implicants and minimized expression is

Solution:

QUESTION: 52

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

Solution:

QUESTION: 53

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

A.
0.55, 1.33
B.
1, 1.33
C.
0.55, 2.66
D.
1, 2.66

Solution:

QUESTION: 54

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

A.
AT
B.
2A²T
C.
D.
None of these

Solution:

QUESTION: 55

The solution of the differential equation

Solution:

QUESTION: 56

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

A.
50 cos ω₀t + 1
B.
50 (5cos ω₀t + 1)
C.
10 (5cos ω₀t + 1)
D.
20 (5cos ω₀t + 1)

Solution:

QUESTION: 57

The following signal pair are defined below

A.
(i) and (ii) only
B.
(ii) only
C.
(i) only
D.
(i) and (iii) only

Solution:

*Answer can only contain numeric values

QUESTION: 58

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