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841
GATE ECE 2003 | Question: 32
The current flowing through the resistance $\text{R}$ in the circuit in the figure has the form $\text{P} \cos 4 t$, where $\text{P}$ is $(0.18+j 0.72)$ $(0.46+j 1.90)$ $-(0.18+j 1.90)$ $-(0.192+j 0.144)$
The current flowing through the resistance $\text{R}$ in the circuit in the figure has the form $\text{P} \cos 4 t$, where $\text{P}$ is$(0.18+j 0.72)$$(0.46+j 1.90)$$-(0...
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842
GATE ECE 2003 | Question: 33
The circuit for $\text{Q. 33-34}$ are given in the figure. For both are the questions, assume that the switch $S$ is in position $1$ for a long time and thrown to position $2$ at $t=0$. At $t=0+$, the current $i_{1}$ is $\frac{-\mathrm{V}}{2 \mathrm{R}}$ $\frac{-\mathrm{V}}{\mathrm{R}}$ $\frac{-\mathrm{V}}{4 \mathrm{R}}$ zero
The circuit for $\text{Q. 33-34}$ are given in the figure. For both are the questions, assume that the switch $S$ is in position $1$ for a long time and thrown to positio...
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843
GATE ECE 2003 | Question: 34
The circuit for $\text{Q. 33-34}$ are given in the figure. For both are the questions, assume that the switch $S$ is in position $1$ for a long time and thrown to position $2$ at $t=0$. $I_{1}(s)$ and $I_{2}(s)$ are the Laplace transforms of $i_{1}(t)$ ...
The circuit for $\text{Q. 33-34}$ are given in the figure. For both are the questions, assume that the switch $S$ is in position $1$ for a long time and thrown to positio...
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844
GATE ECE 2003 | Question: 35
An input voltage $v(t)=10 \sqrt{2} \cos \left(t+10^{\circ}\right)+10 \sqrt{3}$ $\cos \left(2 t+10^{\circ}\right) \mathrm{V}$ is applied to a series combination of resistance $R=1 \Omega$ and an inductance $L=1H$. The resulting steady-state current $i(t)$ in ampere is ... $10 \cos (t-35)+10 \sqrt{\frac{3}{2}} \cos \left(2 t-35^{\circ}\right)$
An input voltage $v(t)=10 \sqrt{2} \cos \left(t+10^{\circ}\right)+10 \sqrt{3}$ $\cos \left(2 t+10^{\circ}\right) \mathrm{V}$ is applied to a series combination of resista...
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845
GATE ECE 2003 | Question: 36
The driving-point impedance $Z(s)$ of a network has the pole-zero locations as shown in the figure. If $Z(0)=3$, then $Z(s)$ is $\frac{3(s+3)}{s^{2}+2 s+3}$ $\frac{2(s+3)}{s^{2}+2 s+2}$ $\frac{3(s-3)}{s^{2}-2 s-2}$ $\frac{2(s-3)}{s^{2}-2 s-3}$
The driving-point impedance $Z(s)$ of a network has the pole-zero locations as shown in the figure. If $Z(0)=3$, then $Z(s)$ is$\frac{3(s+3)}{s^{2}+2 s+3}$$\frac{2(s+3)}{...
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846
GATE ECE 2003 | Question: 37
The impedance parameters $Z_{11}$ and $Z_{12}$ of the two-port network in the figure are $Z_{11}=2.75 \; \Omega$ and $Z_{12}=0.25 \; \Omega$ $Z_{11}=3 \; \Omega$ and $Z_{12}=0.5 \; \Omega$ $Z_{11}=3 \; \Omega$ and $Z_{12}=0.25 \; \Omega$ $Z_{11}=2.25 \; \Omega$ and $Z_{12}=0.5 \; \Omega$
The impedance parameters $Z_{11}$ and $Z_{12}$ of the two-port network in the figure are$Z_{11}=2.75 \; \Omega$ and $Z_{12}=0.25 \; \Omega$$Z_{11}=3 \; \Omega$ and $Z_{12...
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847
GATE ECE 2003 | Question: 38
An $n$-type silicon bar $0.1 \mathrm{~cm}$ long and $100 \; \mu \mathrm{m}^{2}$ in cross-sectional area has a majority carrier concentration of $5 \times 1020 / \mathrm{m}^{3}$ and the carrier mobility is $0.13 \mathrm{~m}^{0} / \mathrm{V}-s$ at $300 \mathrm{~K}$. ... $10^{6} \; \mathrm{ohm}$ $10^{4} \; \mathrm{ohm}$ $10^{-1} \; \mathrm{ohm}$ $10^{-4} \; \mathrm{ohm}$
An $n$-type silicon bar $0.1 \mathrm{~cm}$ long and $100 \; \mu \mathrm{m}^{2}$ in cross-sectional area has a majority carrier concentration of $5 \times 1020 / \mathrm{m...
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848
GATE ECE 2003 | Question: 39
The electron concentration in a sample of uniformly doped $n$-type silicon at $300 \mathrm{~K}$ varies linearly from $10^{17} / \mathrm{cm}^{3}$ at $x=0$ to $6 \times 10^{16} / \mathrm{cm}^{3}$ at $x=2 \; \mu \mathrm{m}$. Assume a situation that electrons are supplied to ... , is zero $- 1120 \; \text{A/cm}^{2}$ $+ 1120 \; \text{A/cm}^{2}$ $- 1120 \; \text{A/cm}^{2}$
The electron concentration in a sample of uniformly doped $n$-type silicon at $300 \mathrm{~K}$ varies linearly from $10^{17} / \mathrm{cm}^{3}$ at $x=0$ to $6 \times 10^...
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849
GATE ECE 2003 | Question: 40
Match items in Group $1$ with items in Group $2,$ ... $\text{P - 3 Q - 4 R - 1 S - 2}$ $\text{P - 2 Q - 1 R - 4 S - 3}$
Match items in Group $1$ with items in Group $2,$ most suitably.$$\begin{array}{ll} \textbf{Group 1} & \textbf{Group 2} \\ \text{P LED} & \text{1 Heavy doping} \\ \text{Q...
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850
GATE ECE 2003 | Question: 41
At $300 \mathrm{~K}$, for a diode current of $1 \mathrm{~mA}$, a certain germanium diode requires a forward bias of $0.1435 \mathrm{~V}$, whereas a certain silicon diode requires a forward bias of $0.178 \mathrm{~V}$. Under the conditions stated above, ... saturation current in germanium diode to that in silicon diode is $1$ $5$ $4 \times 10^{3}$ $8 \times 10^{3}$
At $300 \mathrm{~K}$, for a diode current of $1 \mathrm{~mA}$, a certain germanium diode requires a forward bias of $0.1435 \mathrm{~V}$, whereas a certain silicon diode ...
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851
GATE ECE 2003 | Question: 42
A particular green $\text{LED}$ emits light of wavelength $5490 \text{ A}$. The energy bandgap of the semiconductor material used there is (Planck's constant = $6.626 \times 10^{-34} \mathrm{~J-s})$ $2.26 \; \mathrm{eV}$ $1.98 \; \mathrm{eV}$ $1.17 \; \mathrm{eV}$ $0.74 \; \mathrm{eV}$
A particular green $\text{LED}$ emits light of wavelength $5490 \text{ A}$. The energy bandgap of the semiconductor material used there is (Planck's constant = $6.626 \ti...
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852
GATE ECE 2003 | Question: 43
When the gate-to-source voltage $\left(\mathrm{V}_{\mathrm{GS}}\right)$ of a MOSFET with threshold voltage of $400 \; \mathrm{mV}$, working in saturation is $900 \; \mathrm{mV}$, the drain current is observed to be $1 \mathrm{~mA}$. Neglecting the channel width modulation ... $0.5 \mathrm{~mA}$ $2.0 \mathrm{~mA}$ $3.5 \mathrm{~mA}$ $4.0 \mathrm{~mA}$
When the gate-to-source voltage $\left(\mathrm{V}_{\mathrm{GS}}\right)$ of a MOSFET with threshold voltage of $400 \; \mathrm{mV}$, working in saturation is $900 \; \math...
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853
GATE ECE 2003 | Question: 44
If $\mathrm{P}$ is Passivation, $\mathrm{Q}$ is $n$-well implant, $\mathrm{R}$ is metallization and $S$ is source/drain diffusion, then the order in which they are carried out in a standard $n$-well CMOS fabrication process, is P-Q-R-S Q-S-R-P R-P-S-Q S-R-Q-P
If $\mathrm{P}$ is Passivation, $\mathrm{Q}$ is $n$-well implant, $\mathrm{R}$ is metallization and $S$ is source/drain diffusion, then the order in which they are carrie...
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854
GATE ECE 2003 | Question: 45
An amplifier without feedback has a voltage gain of $50$, input resistance of $1 \mathrm{~K} \Omega$ and output resistance of $2.5 \mathrm{~K} \Omega$ ... $1 / 5 \mathrm{~K} \Omega$ $5 \mathrm{~K} \Omega$ $11 \mathrm{~K} \Omega$
An amplifier without feedback has a voltage gain of $50$, input resistance of $1 \mathrm{~K} \Omega$ and output resistance of $2.5 \mathrm{~K} \Omega$. The input resistan...
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855
GATE ECE 2003 | Question: 46
In the amplifier circuit shown in the figure is the values of $R_{1}$ and $R_{2}$ are such that the transistor is operating at $\mathrm{V}_{\mathrm{CE}}=3 \mathrm{~V}$ and $\mathrm{I}_{\mathrm{C}}=1.5 \mathrm{~mA}$ when its $\beta$ is $150.$ ... $(3 \mathrm{~V}, 2 \mathrm{~mA})$ $(4 \mathrm{~V}, 2 \mathrm{~mA})$ $(4 \mathrm{~V}, 1 \mathrm{~mA})$
In the amplifier circuit shown in the figure is the values of $R_{1}$ and $R_{2}$ are such that the transistor is operating at $\mathrm{V}_{\mathrm{CE}}=3 \mathrm{~V}$ an...
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856
GATE ECE 2003 | Question: 47
The oscillator circuit shown in the figure is has an ideal inverting amplifier. Its frequency of oscillation (in $\mathrm{Hz}$ ) is $\frac{1}{(2 \pi \sqrt{6} \mathrm{RC})}$ $\frac{1}{(2 \pi \mathrm{RC})}$ $\frac{1}{(\sqrt{6} \mathrm{RC})}$ $\frac{1}{\sqrt{6}(2 \pi \mathrm{RC})}$
The oscillator circuit shown in the figure is has an ideal inverting amplifier. Its frequency of oscillation (in $\mathrm{Hz}$ ) is$\frac{1}{(2 \pi \sqrt{6} \mathrm{RC})}...
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857
GATE ECE 2003 | Question: 48
The output voltage of the regulated power supply shown in the figure is $3 \mathrm{~V}$ $6 \mathrm{~V}$ $9 \mathrm{~V}$ $12 \mathrm{~V}$
The output voltage of the regulated power supply shown in the figure is$3 \mathrm{~V}$$6 \mathrm{~V}$$9 \mathrm{~V}$$12 \mathrm{~V}$
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858
GATE ECE 2003 | Question: 49
The action of a $\text{JFET}$ in its equivalent circuit can best be represented as a Current Controlled Current Source Current Controlled Voltage Source Voltage Controlled Voltage Source Voltage Controlled Current Source
The action of a $\text{JFET}$ in its equivalent circuit can best be represented as aCurrent Controlled Current SourceCurrent Controlled Voltage SourceVoltage Controlled V...
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859
GATE ECE 2003 | Question: 50
If the $\text{op-amp}$ in the figure is idea, the output voltage Voult will be equal to $1 \mathrm{~V}$ $6 \mathrm{~V}$ $14 \mathrm{~V}$ $17 \mathrm{~V}$
If the $\text{op-amp}$ in the figure is idea, the output voltage Voult will be equal to$1 \mathrm{~V}$$6 \mathrm{~V}$$14 \mathrm{~V}$$17 \mathrm{~V}$
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860
GATE ECE 2003 | Question: 51
Three identical amplifiers with each one having a voltage gain of $50,$ input resistance of $1 \mathrm{~K} \Omega$ and output resistance of $250 \; \Omega$, are cascaded. The open circuit voltage gain of the combined amplifier is $49 \mathrm{~dB}$ $51 \mathrm{~dB}$ $98 \mathrm{~dB}$ $102 \mathrm{~dB}$
Three identical amplifiers with each one having a voltage gain of $50,$ input resistance of $1 \mathrm{~K} \Omega$ and output resistance of $250 \; \Omega$, are cascaded....
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861
GATE ECE 2003 | Question: 52
An ideal sawtooth voltage waveform of frequency $500 \mathrm{~Hz}$ and amplitude $3 \mathrm{~V}$ is generated by charging a capacitor of $2 \; \mu \mathrm{F}$ in every cycle. The charging requires constant voltage source of $3 \mathrm{~V}$ for $1 \mathrm{~ms}$ ... of $3 \mathrm{~mA}$ for $1 \mathrm{~ms}$ constant current source of $3 \mathrm{~mA}$ for $2 \mathrm{~ms}$
An ideal sawtooth voltage waveform of frequency $500 \mathrm{~Hz}$ and amplitude $3 \mathrm{~V}$ is generated by charging a capacitor of $2 \; \mu \mathrm{F}$ in every cy...
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862
GATE ECE 2003 | Question: 53
The circuit shown in the figure has $4$ boxes each described by inputs $P, Q, R$ and outputs $Y, Z$ with \[\begin{array}{l} Y=P \oplus Q \oplus R \\ Z=R Q+\bar{P} R+Q \bar{P} \end{array}\] The circuit acts as a $4$ bit adder giving $P+Q$ $4$ bit subtractor giving $P-Q$ $4$ bit subtractor giving $Q-P$ $4$ bit adder giving $P+Q+R$
The circuit shown in the figure has $4$ boxes each described by inputs $P, Q, R$ and outputs $Y, Z$ with\[\begin{array}{l}Y=P \oplus Q \oplus R \\Z=R Q+\bar{P} R+Q \bar{P...
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863
GATE ECE 2003 | Question: 54
If the functions $W, X, Y$ and $Z$ are as follows \[\begin{array}{l} W=R+\bar{P} Q+\bar{R} S \\ X=P Q \bar{R} \bar{S}+\bar{P} \bar{Q} \bar{R} \bar{S}+P \bar{Q} \bar{R} \bar{S} \\ Y=R S+\overline{P R+P \bar{Q}+\bar{P} \cdot \bar{Q}} \\ Z=R+S+\overline{P Q+ ... . \bar{R} + P \bar{Q} . \bar{S}} \end{array}\] Then $W = Z, X = \bar{Z}$ $W=Z_{1} X=Y$ $W=Y$ $W = Y = \bar{Z}$
If the functions $W, X, Y$ and $Z$ are as follows\[\begin{array}{l}W=R+\bar{P} Q+\bar{R} S \\X=P Q \bar{R} \bar{S}+\bar{P} \bar{Q} \bar{R} \bar{S}+P \bar{Q} \bar{R} \bar{...
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864
GATE ECE 2003 | Question: 55
A $4$ bit ripple counter and a $4$ bit synchronous counter are made using flip flops having a propagation delay of $10 \mathrm{~ns}$ each. If the worst case delay in the ripple counter and the synchronous counter be $R$ and $S$ ... $\mathrm{R}=30 \mathrm{~ns}, \mathrm{~S}=10 \mathrm{~ns}$
A $4$ bit ripple counter and a $4$ bit synchronous counter are made using flip flops having a propagation delay of $10 \mathrm{~ns}$ each. If the worst case delay in the ...
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865
GATE ECE 2003 | Question: 56
The DTL, TTL, ECL and CMOS families of digital $\mathrm{IC}_{\mathrm{s}}$ are compared in the following $4$ ... $\text{P}$ $\text{Q}$ $\text{R}$ $\text{S}$
The DTL, TTL, ECL and CMOS families of digital $\mathrm{IC}_{\mathrm{s}}$ are compared in the following $4$ columns$$\begin{array}{lllll} & \textbf{(P)} & \textbf{(Q)} & ...
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GATE ECE 2003 | Question: 57
The circuit shown in the figure is a $4$ bit $\text{DAC}$ The input bits $0$ and $1$ are represented by $0$ and $5 \mathrm{~V}$ respectively. The $\text{OP AMP}$ is ideal, but all the resistances and the $5 \mathrm{~V}$ inputs have a tolerance of $\pm 10 \%$. The ... $5 \%$ ) for the tolerance of the $\text{DAC}$ is $\pm 35 \%$ $\pm 20 \%$ $\pm 10 \%$ $\pm 5 \%$
The circuit shown in the figure is a $4$ bit $\text{DAC}$The input bits $0$ and $1$ are represented by $0$ and $5 \mathrm{~V}$ respectively. The $\text{OP AMP}$ is ideal,...
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867
GATE ECE 2003 | Question: 58
The circuit shown in the figure converts BCD to binary code Binary to excess $-3$ code Excess $-3$ to Gray code Gray to Binary code
The circuit shown in the figure convertsBCD to binary codeBinary to excess $-3$ codeExcess $-3$ to Gray codeGray to Binary code
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GATE ECE 2003 | Question: 59
In the circuit shown in the figure $\mathrm{A}$ is a parallel-in, parallel-out $4$ bit register, which loads at the rising edge of the clock $C$. The input lines are connected to a $4$ bit bus, $W.$ Its output acts as the input to a $16 \times 4$ ROM whose output ... $W$ bus at time $t_{1}$ is $0110.$ The data on the bus at time $t_{2}$ is $1111$ $1011$ $1000$ $0010$
In the circuit shown in the figure $\mathrm{A}$ is a parallel-in, parallel-out $4$ bit register, which loads at the rising edge of the clock $C$. The input lines are conn...
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GATE ECE 2003 | Question: 60
In an $8085$ microprocessor, the instruction CMP $B$ has been executed while the content of the accumulator is less than that of register $B$. As a result Carry flag will be set but Zero flag will be reset Carry flag will be reset but Zero flag will be set Both Carry flag and Zero flag will be reset Both Carry flag and Zero flag will be set
In an $8085$ microprocessor, the instruction CMP $B$ has been executed while the content of the accumulator is less than that of register $B$. As a resultCarry flag will ...
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870
GATE ECE 2003 | Question: 61
Let $X$ and $Y$ be two statistically independent random variables uniformly distributed in the ranges $(-1,1)$ and $(-2,1)$ respectively. Let $Z=X+Y$. Then the probability that $(Z \leq-2)$ is zero $\frac{1}{6}$ $\frac{1}{3}$ $\frac{1}{12}$
Let $X$ and $Y$ be two statistically independent random variables uniformly distributed in the ranges $(-1,1)$ and $(-2,1)$ respectively. Let $Z=X+Y$. Then the probabilit...
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871
GATE ECE 2003 | Question: 62
Let $\mathrm{P}$ be linearity, $\mathrm{Q}$ be time-invariance, $\mathrm{R}$ be causality and $\mathrm{S}$ be stability. A discrete-time system has the input-output relationship, \[y(n)=\left\{\begin{array}{ll} x(n) & n \geq 1 \\ 0, & n=0 \\ x(n+1) ... $\mathrm{P}, \mathrm{Q}, \mathrm{R}, \mathrm{S}$ $\mathrm{Q}, \mathrm{R}, \mathrm{S}$ but not $\mathrm{P}$
Let $\mathrm{P}$ be linearity, $\mathrm{Q}$ be time-invariance, $\mathrm{R}$ be causality and $\mathrm{S}$ be stability. A discrete-time system has the input-output relat...
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872
GATE ECE 2003 | Question: 63
Data for Q. 63-64 are given below. Solve the problems and choose the correct answers. The system under consideration is an RC low-pass filter (RC-LPF) with $R=1.0 \mathrm{k} \; \Omega \mathrm{k}$ and $\mathrm{C}=1.0 \; \mu \mathrm{F}$ Let $\mathrm{H}(f)$ denote the ... $f_{1}($ in $\mathrm{Hz})$ is $327.8$ $163.9$ $52.2$ $104.4$
Data for Q. 63-64 are given below. Solve the problems and choose the correct answers.The system under consideration is an RC low-pass filter (RC-LPF) with $R=1.0 \mathrm{...
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873
GATE ECE 2003 | Question: 64
Data for Q. 63-64 are given below. Solve the problems and choose the correct answers. The system under consideration is an $R C$ low-pass filter (RC-LPF) with $R=1.0 \; \mathrm{k} \Omega \mathrm{k}$ and $\mathrm{C}=1.0 \; \mu \mathrm{F}$ Let $t_{g}(f)$ be the group ... $t_{g}\left(f_{2}\right)$ in $\mathrm{ms}$, is $0.717$ $7.17$ $71.7$ $4.505$
Data for Q. 63-64 are given below. Solve the problems and choose the correct answers.The system under consideration is an $R C$ low-pass filter (RC-LPF) with $R=1.0 \; \m...
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874
GATE ECE 2003 | Question: 65
Data for Q. 65-66 are given below. Solve the problems and choose the correct answers. Let $X$ be the Gaussian random variable obtained by sampling the process at $t=t_{i}$ and let \[\mathrm{Q}(\alpha)=\int_{\alpha}^{\infty} \frac{1}{\sqrt{2 \pi}} e^{\frac{x^{2}}{2} ... $\mathrm{Q}\left(\frac{1}{2 \sqrt{2}}\right)$ $1-\mathrm{Q}\left(\frac{1}{2 \sqrt{2}}\right)$
Data for Q. 65-66 are given below. Solve the problems and choose the correct answers.Let $X$ be the Gaussian random variable obtained by sampling the process at $t=t_{i}$...
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875
GATE ECE 2003 | Question: 66
Let $Y$ and $Z$ be the random variables obtained by sampling $X(t)$ at $t=2$ and $t=4$ respectively. Let $W$ $=Y-Z$. The variance of $W$ is $13.36$ $9.36$ $2.64$ $8.00$
Let $Y$ and $Z$ be the random variables obtained by sampling $X(t)$ at $t=2$ and $t=4$ respectively. Let $W$ $=Y-Z$. The variance of $W$ is$13.36$$9.36$$2.64$$8.00$
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876
GATE ECE 2003 | Question: 67
Let $x(t)=2 \cos (800 \pi t)+\cos (1400 \pi t) . x(t)$ is sampled with the rectangular pulse train shown in the figure. The only spectral components (in $\mathrm{kHz}$ ) present in the sampled signal in the frequency range $2.5 \; \mathrm{kHz}$ to $3.5 \; \mathrm{kHz}$ are $2.7,3.4$ $3.3,3.6$ $2.6,2.7,3.3,3.4,3.6$ $2.7,3.3$
Let $x(t)=2 \cos (800 \pi t)+\cos (1400 \pi t) . x(t)$ is sampled with the rectangular pulse train shown in the figure. The only spectral components(in $\mathrm{kHz}$ ) p...
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877
GATE ECE 2003 | Question: 68
The signal flow graph of a system is shown in the figure. The transfer function $\frac{C(s)}{R(s)}$ of the system is $\frac{6}{s^{2}+29 s+6}$ $\frac{6 s}{s^{2}+29 s+6}$ $\frac{s(s+2)}{s^{2}+29 s+6}$ $\frac{s(s+27)}{s^{2}+29 s+6}$
The signal flow graph of a system is shown in the figure. The transfer function $\frac{C(s)}{R(s)}$ of the system is$\frac{6}{s^{2}+29 s+6}$$\frac{6 s}{s^{2}+29 s+6}$$\fr...
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878
GATE ECE 2003 | Question: 69
The root locus of the system $\mathrm{G}(\mathrm{s}) \mathrm{H}(s)$ $=\frac{\mathrm{K}}{s(s+2)(s+3)}$ has the break-away point located at $(-0.5,0)$ $(-2.548,0)$ $(-4,0)$ $(-0.784,0)$
The root locus of the system $\mathrm{G}(\mathrm{s}) \mathrm{H}(s)$ $=\frac{\mathrm{K}}{s(s+2)(s+3)}$ has the break-away point located at$(-0.5,0)$$(-2.548,0)$$(-4,0)$$(-...
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879
GATE ECE 2003 | Question: 70
The approximate Bode magnitude plot of a minimum-phase system is shown in the figure. The transfer function of the system is $10^8 \frac{(s+0.1)^3}{(s+10)^2(s+100)}$ $10^{7} \frac{(s+0.1)^3}{(s+10)(s+100)}$ $10^8 \frac{(s+0.1)^2}{(s+10)^2(s+100)}$ $10^9 \frac{(s+0.1)^3}{(s+10)(s+100)^2}$
The approximate Bode magnitude plot of a minimum-phase system is shown in the figure. The transfer function of the system is$10^8 \frac{(s+0.1)^3}{(s+10)^2(s+100)}$$10^{7...
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GATE ECE 2003 | Question: 71
A second-order system has the transfer function $\frac{C(s)}{R(s)}=\frac{4}{s^{2}+4 s+4}$. With $r(t)$ as the unit-step function, the response $c(t)$ of the system is represented by Fig. $(a)$ Fig. $(b)$ Fig. $(c)$ Fig. $(d)$
A second-order system has the transfer function$\frac{C(s)}{R(s)}=\frac{4}{s^{2}+4 s+4}$.With $r(t)$ as the unit-step function, the response $c(t)$ of the system is repre...
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