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1321
GATE ECE 1994 | Question 3.4
A $p$-type silicon sample has a higher conductivity compared to an $n$-type sample having the same dopant concentration.
A $p$-type silicon sample has a higher conductivity compared to an $n$-type sample having the same dopant concentration.
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1322
GATE ECE 1994 | Question 3.5
Channel current is reduced on application of a more positive voltage to the gate of a depletion mode $n$-channel $\text{MOSFET}$.
Channel current is reduced on application of a more positive voltage to the gate of a depletion mode $n$-channel $\text{MOSFET}$.
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1323
GATE ECE 1994 | Question 3.6
The look-ahead carry adder is a parallel carry adder where all sum digits are generated directly from the input digits.
The look-ahead carry adder is a parallel carry adder where all sum digits are generated directly from the input digits.
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1324
GATE ECE 1994 | Question 3.7
In the output stage of a standard $\text{TTL}$, have a diode between the emitter of the pull-up transistor and the collector of the pull-down transistor. The purpose of this diode is to isolate the output node from the power supply $V_{\alpha^{\circ}}$
In the output stage of a standard $\text{TTL}$, have a diode between the emitter of the pull-up transistor and the collector of the pull-down transistor. The purpose of t...
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1325
GATE ECE 1994 | Question 3.8
Pulse-width modulated signals are immune to noise since their amplitude is constant.
Pulse-width modulated signals are immune to noise since their amplitude is constant.
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1326
GATE ECE 1994 | Question 3.9
Noise figure of an amplifier is always greater than $1$ .
Noise figure of an amplifier is always greater than $1$ .
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1327
GATE ECE 1994 | Question 3.10
If a pure resistance load, when connected to a lossless $75$ – ohm line, produces a $\text{VSWR}$ of $3$ on the line, then the load impedance can only be $25$ ohms.
If a pure resistance load, when connected to a lossless $75$ – ohm line, produces a $\text{VSWR}$ of $3$ on the line, then the load impedance can only be $25$ ohms.
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1330
GATE ECE 1994 | Question 4.3
(A) Very low response at very high frequencies (B) Over shoot (C) Synchro-control transformer output Low-pass systems Velocity damping Natural frequency Phase-sensitive modulation Damping ratio
(A) Very low response at very high frequencies(B) Over shoot(C) Synchro-control transformer outputLow-pass systemsVelocity dampingNatural frequencyPhase-sensitive modulat...
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1332
GATE ECE 1994 | Question: 4.5
(A) Hartley (1) Low frequency oscillator (B) Wien-bridge (2) High frequency oscillator (C) Crystal (3) Stable frequency oscillator (4) Relaxation frequency oscillator (5) Negative resistance oscillator
(A) Hartley(1) Low frequency oscillator(B) Wien-bridge(2) High frequency oscillator(C) Crystal(3) Stable frequency oscillator (4) Relaxation frequency oscillator (5) Nega...
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1333
GATE ECE 1994 | Question: 4.6
Type of $\mathrm{ADC}$ (A) Successive approximation (1) $1$ (B) Dual-slope (2) $8$ (C) Parallel Comparator (3) $16$ (4) $256$ (5) $512$ Maximum conversion for $8$-bit $\text{ADC}$ in clock cycles.
Type of $\mathrm{ADC}$(A) Successive approximation(1) $1$(B) Dual-slope(2) $8$(C) Parallel Comparator(3) $16$ (4) $256$ (5) $512$ Maximum conversion for $8$-bit $\text{AD...
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1334
GATE ECE 1994 | Question 4.7
(a) Single side band (1) Envelope detector (b) Amplitude (2) Integrate and dump modulation (c) Binary phase-shift (3) Hilbert transform keying (4) Ratio detector (5) Phase-locked loop
(a) Single side band(1) Envelope detector(b) Amplitude(2) Integrate and dump modulation(c) Binary phase-shift(3) Hilbert transform keying (4) Ratio detector (5) Phase-loc...
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1335
GATE ECE 1994 | Question 4.8
(A) $\overrightarrow{\mathrm{V}} \times \overrightarrow{\mathrm{H}}=\overrightarrow{\mathrm{J}}$ (1)Continuity equation (B) $\int_{c} \vec{E} \cdot \overrightarrow{a_{t}}=-\frac{d}{f} \int \vec{B} \cdot \overrightarrow{d s}$ (2) Faraday's ... (3) Ampere's Law (4) Gauss's law (5) Biot-Savart law
(A) $\overrightarrow{\mathrm{V}} \times \overrightarrow{\mathrm{H}}=\overrightarrow{\mathrm{J}}$(1)Continuity equation(B) $\int_{c} \vec{E} \cdot \overrightarrow{a_{t}}=-...
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1336
GATE ECE 2007 | Question: 1
If $E$ denotes expectation, the variance of a random variable $X$ is given by $E\left[X^2\right]-E^2[X]$ $E\left[X^2\right]+E^2[X]$ $E\left[X^2\right]$ $E^2[X]$
If $E$ denotes expectation, the variance of a random variable $X$ is given by$E\left[X^2\right]-E^2[X]$$E\left[X^2\right]+E^2[X]$$E\left[X^2\right]$$E^2[X]$
1 votes
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1337
GATE ECE 2007 | Question: 2
The following plot shows a function $y$ which varies linearly with $x$. The value of the integral $I=\displaystyle{}\int_1^2 y d x$ is $1.0$ $2.5$ $4.0$ $5.0$
The following plot shows a function $y$ which varies linearly with $x$. The value of the integral $I=\displaystyle{}\int_1^2 y d x$ is$1.0$$2.5$$4.0$$5.0$
1 votes
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1338
GATE ECE 2007 | Question: 3
For $|x| \ll 1$, $\operatorname{coth}(x)$ can be approximated as $x$ $x^2$ $\frac{1}{x}$ $\frac{1}{x^2}$
For $|x| \ll 1$, $\operatorname{coth}(x)$ can be approximated as$x$$x^2$$\frac{1}{x}$$\frac{1}{x^2}$
1 votes
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1339
GATE ECE 2007 | Question: 4
$\displaystyle{}\lim _{\theta \rightarrow 0} \frac{\sin (\theta / 2)}{\theta}$ is $0.5$ $1$ $2$ not defined
$\displaystyle{}\lim _{\theta \rightarrow 0} \frac{\sin (\theta / 2)}{\theta}$ is$0.5$$1$$2$not defined
1 votes
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1340
GATE ECE 2007 | Question: 5
Which one of the following functions is strictly bounded? $\frac{1}{x^2}$ $e^x$ $x^2$ $e^{-x^2}$
Which one of the following functions is strictly bounded?$\frac{1}{x^2}$$e^x$$x^2$$e^{-x^2}$
1 votes
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1341
GATE ECE 2007 | Question: 6
For the function $e^{-x}$, the linear approximation around $x=2$ is $(3-x) e^{-2}$ $1-x$ $[3+2 \sqrt{2}-\left(1+\sqrt{2}\right) x] e^{-2}$ $e^{-2}$
For the function $e^{-x}$, the linear approximation around $x=2$ is$(3-x) e^{-2}$$1-x$$[3+2 \sqrt{2}-\left(1+\sqrt{2}\right) x] e^{-2}$$e^{-2}$
1 votes
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1343
GATE ECE 2007 | Question: 8
The $RC$ circuit shown in the figure is a low-pass filter a high-pass filter a band-pass filter a band-reject filter
The $RC$ circuit shown in the figure isa low-pass filtera high-pass filtera band-pass filtera band-reject filter
1 votes
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1345
GATE ECE 2007 | Question: 10
In a $p^{+} n$ junction diode under reverse bias, the magnitude of electric field is maximum at the edge of the depletion region on the $p$-side the edge of the depletion region on the $n$-side the $p^{+} n$ junction the centre of the depletion region on the $n$-side
In a $p^{+} n$ junction diode under reverse bias, the magnitude of electric field is maximum atthe edge of the depletion region on the $p$-sidethe edge of the depletion r...
1 votes
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1346
GATE ECE 2007 | Question: 11
The correct full wave rectifier circuit is
The correct full wave rectifier circuit is
1 votes
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1347
GATE ECE 2007 | Question: 12
In a transconductance amplifier, it is desirable to have a large input resistance and a large output resistance a large input resistance and a small output resistance a small input resistance and a large output resistance a small input resistance and a small output resistance
In a transconductance amplifier, it is desirable to havea large input resistance and a large output resistancea large input resistance and a small output resistancea smal...
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1348
GATE ECE 2007 | Question: 13
$\mathrm{X}=01110$ and $\mathrm{Y}=11001$ are two $5$-bit binary numbers represented in two's complement format. The sum of $\mathrm{X}$ and $\mathrm{Y}$ represented in two's complement format using $6$ bits is $100111$ $001000$ $000111$ $101001$
$\mathrm{X}=01110$ and $\mathrm{Y}=11001$ are two $5$-bit binary numbers represented in two's complement format. The sum of $\mathrm{X}$ and $\mathrm{Y}$ represented in t...
1 votes
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1349
GATE ECE 2007 | Question: 14
The Boolean function $Y=A B+C D$ is to be realized using only $2$ -input NAND gates. The minimum number of gates required is $2$ $3$ $4$ $5$
The Boolean function $Y=A B+C D$ is to be realized using only $2$ -input NAND gates. The minimum number of gates required is$2$$3$$4$$5$
1 votes
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1350
GATE ECE 2007 | Question: 15
If the closed-loop transfer function of a control system is given as $T(s)=\dfrac{s-5}{(s+2)(s+3)},$ then it is an unstable system an uncontrollable system a minimum phase system a non-minimum phase system
If the closed-loop transfer function of a control system is given as $T(s)=\dfrac{s-5}{(s+2)(s+3)},$ then it isan unstable systeman uncontrollable systema minimum phase s...
1 votes
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1351
GATE ECE 2007 | Question: 16
If the Laplace transform of a signal $y(t)$ is $Y(s)=\dfrac{1}{s(s-1)},$ then its final value is $-1$ $0$ $1$ Unbounded
If the Laplace transform of a signal $y(t)$ is $Y(s)=\dfrac{1}{s(s-1)},$ then its final value is$-1$$0$$1$Unbounded
1 votes
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1352
GATE ECE 2007 | Question: 17
If $R(\tau)$ is the autocorrelation function of a real, wide-sense stationary random process, then which of the following is $\text{NOT}$ true? $R(\tau)=R(-\tau)$ $|R(\tau)| \leq R(0)$ $R(\tau)=-R(-\tau)$ The mean square value of the process is $R(0)$
If $R(\tau)$ is the autocorrelation function of a real, wide-sense stationary random process, then which of the following is $\text{NOT}$ true?$R(\tau)=R(-\tau)$$|R(\tau)...
1 votes
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1353
GATE ECE 2007 | Question: 18
If $S(f)$ is the power spectral density of a real, wide-sense stationary random process, then which of the following is $\text{ALWAYS}$ true? $S(0) \geq S(f)$ $S(f) \geq 0$ $S(-f)=-S(f)$ $\displaystyle{}\int_{-\infty}^{\infty} S(f) d f=0$
If $S(f)$ is the power spectral density of a real, wide-sense stationary random process, then which of the following is $\text{ALWAYS}$ true?$S(0) \geq S(f)$$S(f) \geq 0$...
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1355
GATE ECE 2007 | Question: 20
If $\mathrm{C}$ is a closed curve enclosing a surface $S$, then the magnetic field intensity $\vec{H}$, the current density $\vec{J}$ and the electric flux density $\vec{D}$ ...
If $\mathrm{C}$ is a closed curve enclosing a surface $S$, then the magnetic field intensity $\vec{H}$, the current density $\vec{J}$ and the electric flux density $\vec{...
1 votes
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1356
GATE ECE 2007 | Question: 21
It is given that $X_{1}, X_{2}, \cdots ,X_{M}$ are $M$ non-zero, orthogonal vectors. The dimension of the vector space spanned by the $2 M$ vectors $X_{1}, X_{2}, \cdots, X_{M},-X_{1},-X_{2}, \cdots,-X_{M}$ is $2 M$ $M+1$ $M$ dependent on the choice of $X_{1}, X_{2}, \cdots, X_{M}$
It is given that $X_{1}, X_{2}, \cdots ,X_{M}$ are $M$ non-zero, orthogonal vectors. The dimension of the vector space spanned by the $2 M$ vectors $X_{1}, X_{2}, \cdots,...
1 votes
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1357
GATE ECE 2007 | Question: 22
Consider the function $f(x)=x^{2}-x-2$. The maximum value of $f(x)$ in the closed interval $[-4,4]$ is $18$ $10$ $-2.25$ indeterminate
Consider the function $f(x)=x^{2}-x-2$. The maximum value of $f(x)$ in the closed interval $[-4,4]$ is$18$$10$$-2.25$indeterminate
1 votes
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1359
GATE ECE 2007 | Question: 24
The solution of the differential equation $k^{2} \dfrac{d^{2} y}{d x^{2}}=y-y_{2}$ under the boundary conditions (i) $y=y_{1}$ at $x=0$ and (ii) $y=y_{2}$ at $x=\infty$, where $k, y_{1}$ and $y_{2}$ ... $y=\left(y_{1}-y_{2}\right) \sinh (x / k)+y_{1}$ $y=\left(y_{1}-y_{2}\right) \exp (-x / k)+y_{2}$
The solution of the differential equation $k^{2} \dfrac{d^{2} y}{d x^{2}}=y-y_{2}$ under the boundary conditions (i) $y=y_{1}$ at $x=0$ and (ii) $y=y_{2}$ at $x=\infty$, ...
1 votes
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1360
GATE ECE 2007 | Question: 25
The equation $x^{3}-x^{2}+4 x-4=0$ is to be solved using the Newton-Raphson method. If $x=2$ is taken as the initial approximation of the solution, then the next approximation using this method will be $\frac{2}{3}$ $\frac{4}{3}$ $1$ $\frac{3}{2}$
The equation $x^{3}-x^{2}+4 x-4=0$ is to be solved using the Newton-Raphson method. If $x=2$ is taken as the initial approximation of the solution, then the next approxim...
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