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Recent questions tagged gate2014-ec-2
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41
GATE ECE 2014 Set 2 | Question: 31
In the h-parameter model of the $2$-port network given in the figure shown, the value of $h_{22}$ (in S) is ______ .
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Network Solution Methods
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37
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gate2014-ec-2
numerical-answers
two-port-network
network-solution-methods
0
votes
0
answers
42
GATE ECE 2014 Set 2 | Question: 32
In the figure shown, the capacitor is initially uncharged. Which one of the following expressions describes the current $I(t)$ (in mA) for $t > 0$? $I(t)= \frac{5}{3}(1-e^{-t/ \tau}), \tau= \frac{2}{3} \text{msec} \\$ ... $I(t)= \frac{5}{2}(1-e^{-t/\tau}), \tau= 3 \text{msec}$
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gate2014-ec-2
electronic-devices
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0
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43
GATE ECE 2014 Set 2 | Question: 33
In the magnetically coupled circuit shown in the figure, $56 \%$ of the total flux emanating from one coil links the other coil. The value of the mutual inductance (in H) is ____ .
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Network Solution Methods
Mar 26, 2018
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Milicevic3306
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39
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gate2014-ec-2
numerical-answers
network-solution-methods
0
votes
0
answers
44
GATE ECE 2014 Set 2 | Question: 34
Assume electronic charge $q= 1.6 \times 10^{-19} \: C$, $kT/q=25 \: mV$ and electron mobility $\mu_{n}= 1000cm^{2}/ V-s$. If the concentration gradient of electrons injected into a $P$-type silicon sample is $ 1 \times 10^{21}/cm^{4}$, the magnitude of electron diffusion current density (in $A/cm^{2}$) is _________ .
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Electronic Devices
Mar 26, 2018
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32
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gate2014-ec-2
numerical-answers
electronic-devices
0
votes
0
answers
45
GATE ECE 2014 Set 2 | Question: 35
Consider an abrupt PN junction (at $T = 300 K$) shown in the figure. The depletion region width $X_{n}$ on the $N$-side of the junction is $0.2 \mu m$ and the permittivity of silicon $( \varepsilon _{gi} )$ is $1.044 \times 10^{-12} \: F/cm$. At the junction, the approximate value of the peak electric field (in $kV/cm$) is ___________.
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Electronic Devices
Mar 26, 2018
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Milicevic3306
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30
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gate2014-ec-2
numerical-answers
electronic-devices
p-n-junction
0
votes
0
answers
46
GATE ECE 2014 Set 2 | Question: 36
When a silicon diode having a doping concentration of $N_{A}= 9\times 10^{16}cm^{-3}$ on $p$-side and $N_{D}= 1 \times 10^{16}cm^{-3}$ on $n$-side is reverse biased, the total depletion width is found to be $3 \mu$ ... $0.3 \mu m$ and $0.42 \times 10^{5} V/cm$ $2.1 \mu m$ and $0.42 \times 10^{5} V/cm$
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Electronic Devices
Mar 26, 2018
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Milicevic3306
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61
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gate2014-ec-2
electronic-devices
intrinsic-and-extrinsic-silicon
0
votes
0
answers
47
GATE ECE 2014 Set 2 | Question: 37
The diode in the circuit shown has $V_{on}$= 0.7$ Volts but is ideal otherwise. If $V_{i}= 5 \sin ( \omega t )$Volts, the minimum and maximum values of $V_{o}$ (in Volts ) are, respectively, $-5$ and $2.7$ $2.7$ and $5$ $-5$ and $3.85$ $1.3$ and $5$
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Analog Circuits
Mar 26, 2018
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Milicevic3306
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38
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gate2014-ec-2
analog-circuits
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votes
0
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48
GATE ECE 2014 Set 2 | Question: 38
For the n-channel MOS transistor shown in the figure, the threshold voltage $V_{Th}$ is $0.8$ V. Neglect channel length modulation effects. When the drain voltage $V_{D}= 1.6 V,$ the drain current $I_{D}$ was found to be $0.5$ mA. If $V_{D}$is adjusted to be $2$ V ... the values of R and $V_{DD}$, the new value of $I_{D}$ (in mA) is $0.625$ $0.75$ $1.125$ $1.5$
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Electronic Devices
Mar 26, 2018
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Milicevic3306
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32
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gate2014-ec-2
electronic-devices
mos-transistor
0
votes
0
answers
49
GATE ECE 2014 Set 2 | Question: 39
For the MOSFETs shown in the figure, the threshold voltage $\mid V_{t} \mid= 2$ V and $K= \frac{1}{2}\mu C_{ox} ( \frac{W}{L} ) = 0.1 \: mA/V^{2}$. The value of $I_{D}$ (in mA) is _______________ .
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Analog Circuits
Mar 26, 2018
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Milicevic3306
15.8k
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48
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gate2014-ec-2
numerical-answers
analog-circuits
mosfet
0
votes
0
answers
50
GATE ECE 2014 Set 2 | Question: 40
In the circuit shown, choose the correct timing diagram of the output (y) from the given waveforms $W1$, $W2$, $W3$ and $W4$. $W1$ $W2$ $W3$ $W4$
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Communications
Mar 26, 2018
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Milicevic3306
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64
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gate2014-ec-2
communications
timing-diagram
0
votes
0
answers
51
GATE ECE 2014 Set 2 | Question: 41
The outputs of the two flip-flops $Q1$, $Q2$ in the figure shown are initialized to $0,0$. The sequence generated at $Q1$ upon application of clock signal is $01110 \dots$ $01010\dots$ $00110\dots$ $01100\dots$
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Combinational Circuits
Mar 26, 2018
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Milicevic3306
15.8k
points
79
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gate2014-ec-2
digital-circuits
sequential-circuit
flip-flops
0
votes
0
answers
52
GATE ECE 2014 Set 2 | Question: 42
For the $8085$ microprocessor, the interfacing circuit to input $8$-bit digital data $( DI_{0}-DI_{7})$ from an external device is shown in the figure. The instruction for correct data transfer is $\text{MVI A, F8H}$ $\text{IN F8H}$ $\text{OUT F8H}$ $\text{LDA F8F8H}$
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Digital Circuits
Mar 26, 2018
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Milicevic3306
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points
86
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gate2014-ec-2
digital-circuits
combinational-circuits
microprocessor-8085
0
votes
0
answers
53
GATE ECE 2014 Set 2 | Question: 43
Consider a discrete-time signal $ x[n]= \begin{cases} n & \text{for } 0\leq n\leq 10 \\ 0 & \text{otherwise }\end{cases}$ If $y[n]$ is the convolution of $x[n]$ with itself, the value of $y[4]$ is _______ .
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Continuous-time Signals
Mar 26, 2018
by
Milicevic3306
15.8k
points
42
views
gate2014-ec-2
numerical-answers
continuous-time-signals
discrete-time-signals
0
votes
0
answers
54
GATE ECE 2014 Set 2 | Question: 44
The input-output relationship of a causal stable LTI system is given as $y[n] = \alpha \: y[n-1] + \beta \: x[n]$. If the impulse response $h[n]$ of this system satisfies the condition $\sum_{n=0}^{\infty}h[n]= 2$, the relationship between $\alpha$ and $\beta$ is $\alpha = 1-\beta /2$ $\alpha = 1+\beta /2$ $\alpha = 2\beta$ $\alpha = -2\beta$
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Communications
Mar 26, 2018
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Milicevic3306
15.8k
points
41
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gate2014-ec-2
communications
linear-time-invariant-systems
0
votes
0
answers
55
GATE ECE 2014 Set 2 | Question: 45
The value of the integral $\int_{-\infty }^{\infty } \text{sinc}^{2}(5t) \: dt$ is _______.
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Calculus
Mar 26, 2018
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15.8k
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49
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gate2014-ec-2
numerical-answers
calculus
definite-integrals
0
votes
0
answers
56
GATE ECE 2014 Set 2 | Question: 46
An unforced linear time invariant (LTI) system is represented by $\begin{bmatrix} x_1 \\ x_2 \end{bmatrix} = \begin{bmatrix} -1 & 0 \\ 0& -2 \end{bmatrix} \begin{bmatrix} x_1 \\ x_2 \end{bmatrix}$ If the initial conditions are $x_1(0)= 1$ and $x_2(0)= -1$, the solution of the ... $x_{1}(t)= -e^{-t}, \: x_{2}(t)= -2e^{-t}$
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Continuous-time Signals
Mar 26, 2018
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Milicevic3306
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points
66
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gate2014-ec-2
continuous-time-signals
signals-and-systems
linear-time-invariant-systems
0
votes
0
answers
57
GATE ECE 2014 Set 2 | Question: 47
The Bode asymptotic magnitude plot of a minimum phase system is shown in the figure. If the system is connected in a unity negative feedback configuration, the steady state error of the closed loop system, to a unit ramp input, is _________.
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Control Systems
Mar 26, 2018
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60
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gate2014-ec-2
numerical-answers
control-systems
bode-and-root-locus-plots
0
votes
0
answers
58
GATE ECE 2014 Set 2 | Question: 48
Consider the state space system expressed by the signal flow diagram shown in the figure. The corresponding system is always controllable always observable always stable always unstable
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Continuous-time Signals
Mar 26, 2018
by
Milicevic3306
15.8k
points
75
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gate2014-ec-2
continuous-time-signals
to-be-tagged
0
votes
0
answers
59
GATE ECE 2014 Set 2 | Question: 49
The input to a $1$ – bit quantizer is a random variable $X$ with pdf $f_{X}( x )= 2e^{-2x}$ for $x\geq 0$ and $f_{X} (x )= 0$ for $x< 0$. For outputs to be of equal probability, the quantizer threshold should be ______.
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Probability and Statistics
Mar 26, 2018
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points
55
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gate2014-ec-2
numerical-answers
probability-and-statistics
probability
probability-density-function
random-variable
0
votes
0
answers
60
GATE ECE 2014 Set 2 | Question: 50
Coherent orthogonal binary FSK modulation is used to transmit two equiprobable symbol waveforms $s_{1}( t )= \alpha \cos 2\pi f_1 t$, and $s_2(t) = \alpha \cos 2 \pi f_2 t$ where $\alpha = 4$ ... error probability for a data rate of $500$ kbps is $Q(2)$ $Q(2\sqrt{2})$ $Q(4)$ $Q(4\sqrt{2})$
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Communications
Mar 26, 2018
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Milicevic3306
15.8k
points
61
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gate2014-ec-2
communications
frequency-shift-keying
0
votes
0
answers
61
GATE ECE 2014 Set 2 | Question: 51
The power spectral density of a real stationary random process $X(t)$ is given by $ S_X (f) = \begin{cases} \frac{1}{W}, & \mid f \mid \leq W \\ 0, & \mid f \mid > W \end{cases}$ The value of the expectation $E \left [ \pi X(t)X\left ( t-\frac{1}{4W} \right ) \right ]$ is __________.
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Communications
Mar 26, 2018
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Milicevic3306
15.8k
points
48
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gate2014-ec-2
numerical-answers
communications
autocorrelation-and-power-spectral-density
0
votes
0
answers
62
GATE ECE 2014 Set 2 | Question: 52
In the figure, $M(f)$ is the Fourier transform of the message signal $m(t)$ where $A = 100$ Hz and $B = 40$ Hz. Given $v(t)= \cos (2\pi f_{c}t)$ and $w(t)= \cos (2\pi (f_{c}+A)t)$, where $f_{c}>A$. The cutoff frequencies of both the filters are $f_{c}$. The bandwidth of the signal at the output of the modulater (in Hz) is ______.
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Continuous-time Signals
Mar 26, 2018
by
Milicevic3306
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points
77
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gate2014-ec-2
numerical-answers
continuous-time-signals
fourier-transform
0
votes
0
answers
63
GATE ECE 2014 Set 2 | Question: 53
If the electric field of a plane wave is $\overrightarrow{E}(z,t)= \hat{x}3 \cos(\omega t-kz+30^{\circ}) – \hat{y} 4 \sin(\omega t – kz+45^{\circ}) (mV/m),$ the polarization state of the plane wave is left elliptical left circular right elliptical right circular
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Electromagnetics
Mar 26, 2018
by
Milicevic3306
15.8k
points
30
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gate2014-ec-2
plane-waves-and-properties
electromagnetics
0
votes
0
answers
64
GATE ECE 2014 Set 2 | Question: 54
In the transmission line shown, the impedance $Z_{\text{in}}$ (in ohms) between node A and the ground is _________.
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Electromagnetics
Mar 26, 2018
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Milicevic3306
15.8k
points
48
views
gate2014-ec-2
numerical-answers
electromagnetics
impedance
0
votes
0
answers
65
GATE ECE 2014 Set 2 | Question: 55
For a rectangular waveguide of internal dimension $a\times b \: (a> b)$, the cut-off frequency for the $TE_{11}$ mode is the arithmetic mean of the cut-off frequencies for $TE_{10}$ mode and $TE_{20}$ mode. If $a= \sqrt{5}$ cm, the value of $b$ (in cm) is ______.
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Electromagnetics
Mar 26, 2018
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Milicevic3306
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points
38
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gate2014-ec-2
numerical-answers
electromagnetics
waveguides
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