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Recent questions tagged gate2017ec1
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GATE ECE 2017 Set 1  GA Question: 10
A contour line joins locations having the same height above the mean sea level. The following is a contour plot of a geographical region. Contour lines are shown at $25$ m intervals in this plot. The path from $P$ to $Q$ is best described by UpDownUpDown DownUpDownUp DownUpDown UpDownUp
asked
May 31, 2019
in
Numerical Ability
by
Lakshman Patel RJIT
(
3.8k
points)

75
views
gate2017ec1
numericalability
datainterpretation
contourplots
0
votes
0
answers
2
GATE ECE 2017 Set 1  Question: 48
Which one of the following options correctly describes the locations of the roots of the equation $s^{4}+s^{2}+1=0$ on the complex plane? Four left half plane(LHP) roots One right half plane(RHP) root,one LHP root and two roots on the imaginary axis Two RHP roots and two LHP roots All four roots are on the imaginary axis
asked
Nov 17, 2017
in
Complex Analysis
by
admin
(
2.8k
points)

53
views
gate2017ec1
complexanalysis
0
votes
0
answers
3
GATE ECE 2017 Set 1  Question: 49
The Nyquist plot of the transfer function $G(s)=\frac{K}{(s^{2}+2s+2)(s+2)}$ does not encircle the point $(1+j0)$ for $K=10$ but does encircle the point $(1+j0)$ for $K=100$. Then the closed loop system (having unity gain feedback) is stable ... $K=10$ and unstable for $K=100$ unstable for $K=10$ and stable for $K=100$ stable for $K=10$ and unstable for $K=100$
asked
Nov 17, 2017
in
Control Systems
by
admin
(
2.8k
points)

45
views
gate2017ec1
nyquist
controlsystems
0
votes
0
answers
4
GATE ECE 2017 Set 1  Question: 50
In binary frequency shift keying (FSK), the given signal waveforms are $u_{0}(t)=5\, \cos(20000\pi t)\, ;0\leq t\leq T \text{, and } \\ u_{1}(t)=5\, \cos(22000\pi t)\, ;0 \leq t \leq T,$ where $T$ is the bitduration interval and $t$ is in seconds ... (in milliseconds) required to have $u_{0}(t)$ and $u_{1}(t)$ uncorrelated is $0.25$ ms $0.5$ ms $0.75$ ms $1.0$ ms
asked
Nov 17, 2017
in
Communications
by
admin
(
2.8k
points)

52
views
gate2017ec1
digitalcommunication
frequencyshiftkeying
communications
0
votes
0
answers
5
GATE ECE 2017 Set 1  Question: 51
Let $X(t)$ be a wide sense stationary random process with the power spectral density $S_{X}(f)$ as shown in Figure (a), where $f$ is in Hertz$(Hz)$. The random process $X(t)$ ... Select the correct option: only I is true only II and III are true only I and II are true only I and III are true
asked
Nov 17, 2017
in
Communications
by
admin
(
2.8k
points)

28
views
gate2017ec1
autocorrelationandpowerspectraldensity
communications
0
votes
0
answers
6
GATE ECE 2017 Set 1  Question: 53
An optical fiber is kept along the $\hat{z}$ direction. The refractive indices for the electric fields along $\hat{x}$ and $\hat{y}$ directions in the fiber are $n_{x}=1.5000$ and $n_{y}=1.5001$, ... is circularly polarized at the input of the fiber, the minimum propagation distance after which it becomes linearly polarized, in centimeters,is______________.
asked
Nov 17, 2017
in
Electromagnetics
by
admin
(
2.8k
points)

31
views
gate2017ec1
polarization
opticalfiber
numericalanswers
electromagnetics
0
votes
0
answers
7
GATE ECE 2017 Set 1  Question: 55
A half wavelength dipole is kept in the $xy$ plane and oriented along $45^{\circ}$ from the $x$axis. Determine the direction of null in the radiation pattern for $0\leq \phi \leq \pi$. Here the angle $\theta (0\leq \theta \leq \pi )$ is measured from the $z$axis and ... $\theta =45^{o},\phi =90^{o}$ $\theta =90^{o},\phi =135^{o}$ $\theta =45^{o},\phi =135^{o}$
asked
Nov 17, 2017
in
Electromagnetics
by
admin
(
2.8k
points)

54
views
gate2017ec1
antennas
electromagnetics
0
votes
0
answers
8
GATE ECE 2017 Set 1  Question: 52
A continuous time signal $x(t)=4 \cos(200\pi t)+8 \cos(400\pi t)$, where $t$ is in seconds, is the input to a linear time invariant (LTI) filter with the impulse response $h(t)=\begin{cases} \frac{2 \sin (300\pi t)}{\pi t},& t\neq 0 \\ 600, & t=0. \end{cases}$ Let $y(t)$ be the output of this filter. The maximum value of $ \mid y(t) \mid $ is _________.
asked
Nov 17, 2017
in
Continuoustime Signals
by
admin
(
2.8k
points)

43
views
gate2017ec1
numericalanswers
continuoustimesignals
lineartimeinvariantsystems
0
votes
0
answers
9
GATE ECE 2017 Set 1  Question: 54
The expression for an electric field in free space is , $\textbf{E}=E_{0}( \hat{x}+\hat{y}+j2 \hat{z} )e^{j( \omega tkx+ky)}$ where $x,y,z$ represent the special coordinates, $t$ represents time, and ... normal to the $z$axis represents an elliptically polarized plane wave propagating along the $x  y$ plane represents a linearly polarized plane wave
asked
Nov 17, 2017
in
Electromagnetics
by
admin
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2.8k
points)

43
views
gate2017ec1
planewavesandproperties
electromagnetics
0
votes
0
answers
10
GATE ECE 2017 Set 1  Question: 41
For the circuit shown, assume that the NMOS transistor is in saturation. Its threshold voltage $V_{tn}=1V$ and its transconductance parameter $\mu_{n}C_{ox}\big(\frac{W}{L}\big)=1 \: mA/V^{2}$.Neglect channel length modulation and body bias effects. Under these conditions, the drain current $I_{D}$ in $mA$ is ________.
asked
Nov 17, 2017
in
Analog Circuits
by
admin
(
2.8k
points)

57
views
gate2017ec1
bjtandmosfetamplifiers
numericalanswers
analogcircuits
0
votes
0
answers
11
GATE ECE 2017 Set 1  Question: 46
A finite state machine (FSM) is implemented using the D flipflop A and B, and logic gates, as shown in the figure below. The four possible states of the FSM are $Q_{A}Q_{B}=00,01,10$ and $11$. Assume that $X_{IN}$ is held at a constant logic ... states if $X_{IN}=0$ only two or four possible states if $X_{IN}=1$ only two or four possible states if $X_{IN}=0$
asked
Nov 17, 2017
in
Digital Circuits
by
admin
(
2.8k
points)

123
views
gate2017ec1
digitalcircuits
sequentialcircuit
counters
0
votes
0
answers
12
GATE ECE 2017 Set 1  Question: 45
The following FIVE instructions were executed on an $8085$ microprocessor. MVI A, $33$H MVI B, $78$H ADD B CMA ANI $32$H The Accumulator value immediately after the execution of the fifth instruction is $00H$ $10H$ $11H$ $32H$
asked
Nov 17, 2017
in
Digital Circuits
by
admin
(
2.8k
points)

95
views
gate2017ec1
digitalcircuits
microprocessor8085
0
votes
0
answers
13
GATE ECE 2017 Set 1  Question: 41
For the DC analysis of the CommonEmitter amplifier shown, neglect the base current and assume that the emitter and collector currents are equal. Given that $V_{T}=25mV,V_{BE}=0.7V$, and the BJT output resistance $r_{o}$ is practically infinite. Under these conditions, the midband voltage gain magnitude, $A_{v}=\mid v_{o}/v_{i} \mid $, V/V is ____________.
asked
Nov 17, 2017
in
Analog Circuits
by
admin
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2.8k
points)

20
views
gate2017ec1
bjtandmosfetamplifiers
numericalanswers
analogcircuits
0
votes
0
answers
14
GATE ECE 2017 Set 1  Question: 38
As shown, two Silicon (Si) abrupt $pn$ junction diodes are fabricated with uniform donor doping concentrations of $ N_{D1}=10^{14} cm^{3} $ and $N_{D2}=10^{16}cm^{3}$ in the $n$regions of the diodes, and uniform acceptor ... in potentials of the diodes, the ratio $C_{2}/C_{1}$ of their reverse bias capacitance for the same applied reverse bias, is _________.
asked
Nov 17, 2017
in
Electronic Devices
by
admin
(
2.8k
points)

22
views
gate2017ec1
numericalanswers
pnjunction
electronicdevices
0
votes
0
answers
15
GATE ECE 2017 Set 1  Question: 42
The amplifier circuit shown in the figure is implemented using a compensated operational amplifier (opamp), and has an openloop voltage gain, $A_{0}=10^{5}V/V$ and an openloop cutoff frequency, $f_{c}=8Hz$. The voltage gain of the amplifier at $15$ kHz, in V/V, is____________.
asked
Nov 17, 2017
in
Analog Circuits
by
admin
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2.8k
points)

35
views
gate2017ec1
numericalanswers
analogcircuits
opamps
0
votes
0
answers
16
GATE ECE 2017 Set 1  Question: 39
In the figure shown, the $npn$ transistor acts as a switch. For the input $V_{in}(t)$ as shown in the figure, the transistor switches between the cutoff and saturation regions of operation, when $T$ is large. Assume collectortoemitter ... $(\alpha)$ of the transistor for the switching should be __________.
asked
Nov 17, 2017
in
Analog Circuits
by
admin
(
2.8k
points)

26
views
gate2017ec1
bipolarjunctiontransistor
numericalanswers
analogcircuits
0
votes
0
answers
17
GATE ECE 2017 Set 1  Question: 44
A $4$bit shift register circuit configured for rightshift operation, i.e. $D_{in}\rightarrow A,A\rightarrow B,B\rightarrow C,C\rightarrow D$, is shown. If the present state of the shift register is $ABCD=1101$, the number of clock cycles required to reach the state $ABCD=1111$ is _________.
asked
Nov 17, 2017
in
Digital Circuits
by
admin
(
2.8k
points)

78
views
gate2017ec1
digitalcircuits
sequentialcircuit
shiftregisters
numericalanswers
0
votes
0
answers
18
GATE ECE 2017 Set 1  Question: 47
A linear time invariant (LTI) system with the transfer function $G(s)=\frac{K(s^{2}+2s+2)}{(s_{2}3s+2)}$ is connected in unity feedback configuration as shown in the figure. For the closed loop system shown, the root locus for $0< K < \infty$ ... $K>1.5$ $1<K<1.5$ $0<K<1$ no positive value of $K$
asked
Nov 17, 2017
in
Control Systems
by
admin
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2.8k
points)

47
views
gate2017ec1
lineartimeinvariantsystems
transferfunction
controlsystems
bodeandrootlocusplots
0
votes
0
answers
19
GATE ECE 2017 Set 1  Question: 36
The dependence of drift velocity of electrons on electric field in a semiconductor is shown below. The semiconductor has a uniform electron concentration of $n=1 \times 10^{16} cm^{3}$ and electronic charge $q=1.6 \times 10 ^{19}C$. If a bias ... a $1 µm$ region of this semiconductor, the resulting current density in this region, in $kA/cm^{2} $, is _____.
asked
Nov 17, 2017
in
Electronic Devices
by
admin
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2.8k
points)

74
views
gate2017ec1
carriertransport
numericalanswers
electronicdevices
+1
vote
0
answers
20
GATE ECE 2017 Set 1  Question: 37
As shown , a uniformly doped Silicon bar of length $L=0.1\mu m$ with a donor concentration $N_{D}=10^{16}cm^{3}$ is illuminated at $x=0$ ... that goes to $0$ at $x=L$, the magnitude of the diffusion current density at $x=L/2$, in $A/cm^{2}$, is ___________.
asked
Nov 17, 2017
in
Electronic Devices
by
admin
(
2.8k
points)

67
views
gate2017ec1
numericalanswers
electronicdevices
intrinsicandextrinsicsilicon
carriertransport
0
votes
0
answers
21
GATE ECE 2017 Set 1  Question: 43
Which one of the following gives the simplified sum of products expression for the Boolean function $F=m_{0}+m_{2}+m_{3}+m_{5}$, where $m_{0},m_{2},m_{3}$ and $m_{5}$ are minterms corresponding to the inputs $A,B$ and $C$ with $A$ as the $MSB$ and ... $\overline{A} BC+\overline{A} \: \overline{C}+A \overline{B}C$
asked
Nov 17, 2017
in
Digital Circuits
by
admin
(
2.8k
points)

30
views
gate2017ec1
digitalcircuits
booleanalgebra
0
votes
0
answers
22
GATE ECE 2017 Set 1  Question: 31
Let $x(t)$ be a continuous time periodic signal with fundamental period $T=1$ seconds.Let ${a_{k} }$ be the complex Fourier series coefficients of $x(t)$, where $k$ is integer valued. Consider the following statements about $x(3t)$: The complex ... one of the following is correct? Only II and III are true Only I and III are true Only III is true Only I is true
asked
Nov 17, 2017
in
Continuoustime Signals
by
admin
(
2.8k
points)

42
views
gate2017ec1
fouriertransform
continuoustimesignals
signalsandsystems
0
votes
0
answers
23
GATE ECE 2017 Set 1  Question: 9
A bar of Gallium Arsenide (GaAs) is doped with silicon such that the silicon atoms occupy Gallium and Arsenic sites in the GaAs crystal. Which one of the following statements is true? Silicon atoms act as $p$type dopants in Arsenic sites and ... Arsenic sites as well as Gallium sites Silicon atoms act as $n$type dopants in Arsenic sites as well as Gallium sites
asked
Nov 17, 2017
in
Electromagnetics
by
admin
(
2.8k
points)

185
views
gate2017ec1
electromagnetics
0
votes
0
answers
24
GATE ECE 2017 Set 1  Question: 33
Let $h[n]$ ... radians. Given that $H(\omega_{0})=0$ and $0< \omega_{0} < \pi$, the value of $\omega_{0}$ (in radians) is equal to__________.
asked
Nov 17, 2017
in
Continuoustime Signals
by
admin
(
2.8k
points)

33
views
gate2017ec1
numericalanswers
continuoustimesignals
lineartimeinvariantsystems
fouriertransform
0
votes
0
answers
25
GATE ECE 2017 Set 1  Question: 25
Consider a wireless communication link between a transmitter and a receiver located in free space, with finite and strictly positive capacity. If the effective areas of the transmitter and the receiver antennas, and the distance between them are all doubled, and ... factor of $2$ Decreases by a factor of $2$ Remains unchanged Decreases by a factor of $\sqrt{2}$
asked
Nov 17, 2017
in
Electromagnetics
by
admin
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2.8k
points)

42
views
gate2017ec1
antennas
electromagnetics
0
votes
0
answers
26
GATE ECE 2017 Set 1  Question: 34
The figure shows an RLC circuit excited by the sinusoidal voltage $100 \cos(3t)$ Volts, where $t$ is in seconds. The ratio $\frac{\text{amplitude of }V_{2}}{\text{amplitude of }V{1}}$ is______.
asked
Nov 17, 2017
in
Network Solution Methods
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admin
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2.8k
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52
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gate2017ec1
numericalanswers
networksolutionmethods
rlccircuits
0
votes
0
answers
27
GATE ECE 2017 Set 1  Question: 35
In the circuit shown, the voltage $V_{IN}(t)$ is described by: $V_{IN}(t)=\begin{cases} 0, & \text{for } t< 0 \\ 15 \text{Volts} & \text{for } t\geq 0 \end{cases}$ where $t$ is in seconds. The time (in seconds) at which the current $I$ in the circuit will reach the value $2$ Amperes is ___________.
asked
Nov 17, 2017
in
Analog Circuits
by
admin
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2.8k
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27
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gate2017ec1
numericalanswers
analogcircuits
0
votes
0
answers
28
GATE ECE 2017 Set 1  Question: 20
Which of the following can be the polezero configuration of a phaselag controller (lag compensator)?
asked
Nov 17, 2017
in
Analog Circuits
by
admin
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2.8k
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81
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gate2017ec1
mosfet
analogcircuits
0
votes
0
answers
29
GATE ECE 2017 Set 1  Question: 32
Two discretetime signals $x[n]$ and $h[n]$ are both nonzero only for $n=0,1,2$, and are zero otherwise .It is given that $x[0]=1, \: x[1]=2, \: x[2]=1, \: h[0]=1$ Let $y[n]$ be the linear convolution of $x[n]$ and $h[n]$. Given that $y[1]=3$ and $y[2]=4$, the value of the expression $(10y[3]+y[4])$ is__________.
asked
Nov 17, 2017
in
Continuoustime Signals
by
admin
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2.8k
points)

46
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gate2017ec1
numericalanswers
continuoustimesignals
discretetimesignals
signalsandsystems
0
votes
0
answers
30
GATE ECE 2017 Set 1  Question: 28
Let $I=\int_{c}\left ( 2zdx+2ydy+2xdx \right )$ where $x,y,z$ are real, and let $C$ be the straight line segment from point $A:(0,2,1)$ to point $B:(4,1,1)$.The value of $I$ is ____________.
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Nov 17, 2017
in
Complex Analysis
by
admin
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2.8k
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66
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gate2017ec1
complexanalysis
numericalanswers
0
votes
0
answers
31
GATE ECE 2017 Set 1  Question: 29
Which one of the following is the general solution of the first order differential equation $\frac{dy}{dx}=(x+y1)^{2},$ where $x,y$ are real? $y=1+x+\tan^{1}(x+c)$, where $c$ is a constant $y=1+x+\tan(x+c)$, where $c$ is a constant $y=1x+\tan^{1}(x+c)$, where $c$ is a constant $y=1x+\tan(x+c)$, where $c$ is a constant
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Nov 17, 2017
in
Differential Equations
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2.8k
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28
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gate2017ec1
differentialequations
firstorderdifferentialequation
0
votes
0
answers
32
GATE ECE 2017 Set 1  Question: 26
Let $f(x)=e^{x+x^{2}}$ for real $x$ . From among the following, choose the Taylor series approximation of $f(x)$ around $x=0$, which includes all powers of $x$ less than or equal to $3$. $1 + x + x^{2} + x^{3} $ $1 + x +\frac{3}{2} x^{2} + x^{3} $ $1 + x +\frac{3}{2} x^{2} + \frac{7}{6}x^{3} $ $1 + x +3 x^{2} + 7x^{3} $
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Nov 17, 2017
in
Calculus
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2.8k
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32
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gate2017ec1
calculus
taylorseries
0
votes
0
answers
33
GATE ECE 2017 Set 1  Question: 19
Consider a stable system with transfer function,$G(s)=\frac{s^{p}+b_{1}s^{p1}+\dots +b_{p}}{s^{q}+a_{1}s^{q1}+\dots +a_{q}}$, where $b_1, \dots ,b_p$ and $a_1, \dots ,a_q$ are real valued constants.The slope of the Bode log magnitude curve of $G(s)$ ... of values for $p$ and $q$ is $p=0$ and $q=3$ $p=1$ and $q=7$ $p=2$ and $q=3$ $p=3$ and $q=5$
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Nov 17, 2017
in
Control Systems
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admin
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39
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gate2017ec1
bodeandrootlocusplots
controlsystems
0
votes
0
answers
34
GATE ECE 2017 Set 1  Question: 15
In the latch circuit shown, the $NAND$ gates have nonzero, but unequal propagation delays. The present input condition is $P=Q=’0’$. If the input condition is changed simultaneously to $P=Q=’1’$, the outputs $X$ and $Y$ are, $X=’1’$, $Y=’1’$ either $X=’1’$, $Y=’0’$ or $X=’0’$, $Y=’1’$ either $X=’1’$, $Y=’1’$ or $X=’0’$, $Y=’0’$ $X=’0’$, $Y=’0’$
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Nov 17, 2017
in
Digital Circuits
by
admin
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2.8k
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57
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gate2017ec1
digitalcircuits
sequentialcircuit
latch
0
votes
0
answers
35
GATE ECE 2017 Set 1  Question: 18
The open loop transfer function $G(s)=\frac{(s+1)}{s^{p}(s+2)(s+3)}$ where $p$ is an integer, is connected in unity feedback configuration as shown in figure. Given that the steady state error is zero for unit step input and is $6$ for unit ramp input, the parameter $p$ is__________.
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Nov 17, 2017
in
Control Systems
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admin
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85
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gate2017ec1
numericalanswers
controlsystems
transferfunction
0
votes
0
answers
36
GATE ECE 2017 Set 1  Question: 15
A good transconductance amplifier should have high input resistance and low output resistance low input resistance and high output resistance high input and output resistances low input and output resistances
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Nov 17, 2017
in
Analog Circuits
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admin
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2.8k
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48
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gate2017ec1
analogcircuits
amplifier
0
votes
0
answers
37
GATE ECE 2017 Set 1  Question: 22
Which one of the following statements about differential pulse code modulation (DPCM) is true? The sum of message signal sample with its prediction is quantized The message signal sample is directly quantized, and its prediction is not ... signal sample and a random signal is quantized The difference of message signal sample with its prediction is quantized
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Nov 17, 2017
in
Communications
by
admin
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2.8k
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1.1k
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gate2017ec1
digitalcommunications
differentialpulsecodemodulation
0
votes
0
answers
38
GATE ECE 2017 Set 1  Question: 23
In a digital communication system, the overall pulse shape $p(t)$ at the receiver before the sampler has the Fourier transform $P(f)$. If the symbols are transmitted at the rate of $2000$ symbols per second, for which of the following cases is the inter symbol interference zero?
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Nov 17, 2017
in
Communications
by
admin
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2.8k
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193
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gate2017ec1
digitalcommunication
communications
0
votes
0
answers
39
GATE ECE 2017 Set 1  Question: 14
The Miller effect in the context of a Common Emitter amplifier explains An increase in the lowfrequency cutoff frequency An increase in the highfrequency cutoff frequency A decrease in the lowfrequency cutoff frequency A decrease in the high frequency cutoff frequency
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Nov 17, 2017
in
Analog Circuits
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2.8k
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222
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gate2017ec1
amplifier
analogcircuits
0
votes
0
answers
40
GATE ECE 2017 Set 1  Question: 24
The voltage of an electromagnetic wave propagating in a coaxial cable with uniform characteristic impedance is $V(l)= e^{\gamma l +j\omega t }$ Volts, where $l$ ... rad/s is the angular frequency. The absolute value of the attenuation in the cable in dB/meter is__________.
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Nov 17, 2017
in
Electromagnetics
by
admin
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2.8k
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61
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gate2017ec1
transmissionlines
impedence
numericalanswers
electromagnetics
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