Register
Filter

Recent questions without answers

0 votes
0 answers
1242
GATE ECE 2006 | Question: 61
A zero- mean white Gaussian noise is passed through an ideal lowpass filter of ban width $10 \; \mathrm{kHz}$. The output is the uniformly sampled with sampling period $t_{s}=0.03 \; \mathrm{msec}$. The samples so obtained would be correlated statistically independent uncorrelated orthogonal
A zero- mean white Gaussian noise is passed through an ideal lowpass filter of ban width $10 \; \mathrm{kHz}$. The output is the uniformly sampled with sampling period $t...
0 votes
0 answers
1244
GATE ECE 2006 | Question: 63
The diagonal clipping in Amplitude Demodulation (using envelope detector) can be avoided if RC time-constant of the envelope detector satisfies the following condition, (here $W$ is message bandwidth and $\omega_{c}$ ... $\mathrm{RC}<\frac{1}{\omega_{c}}$ $\mathrm{RC}>\frac{1}{\omega_{c}}$
The diagonal clipping in Amplitude Demodulation (using envelope detector) can be avoided if RC time-constant of the envelope detector satisfies the following condition, (...
0 votes
0 answers
1245
GATE ECE 2006 | Question: 64
In the following figure the minimum value of the constant ' $C$ ', which is to be added to $y_{1}(t)$ such that $y_{1}(t)$ and $y_{2}(t)$ are different, is $\Delta$ $\frac{\Delta}{2}$ $\frac{\Delta^{2}}{12}$ $\frac{\Delta}{\mathrm{L}}$
In the following figure the minimum value of the constant ' $C$ ', which is to be added to $y_{1}(t)$ such that $y_{1}(t)$ and $y_{2}(t)$ are different, is$\Delta$$\frac{...
0 votes
0 answers
1249
GATE ECE 2006 | Question: 68
When a plane wave travelling in free-space is incident normally on a medium having $\varepsilon_{t}=4.0$, then fraction of power transmitted into the medium is given by $\frac{8}{9}$ $\frac{1}{2}$ $\frac{1}{3}$ $\frac{5}{6}$
When a plane wave travelling in free-space is incident normally on a medium having $\varepsilon_{t}=4.0$, then fraction of power transmitted into the medium is given by$\...
0 votes
0 answers
1250
GATE ECE 2006 | Question: 69
A rectangular waveguide having $\mathrm{TE}_{10}$ mode as dominant mode is having a cutoff frequency of $18-\mathrm{GHz}$ for the $\mathrm{TE}_{w,}$ mode. The inner broad-wall dimension of the rectangular waveguide is $\frac{5}{3} \; \mathrm{cms}$ $5 \; \mathrm{cms}$ $\frac{5}{2} \; \mathrm{cms}$ $10 \; \mathrm{cms}$
A rectangular waveguide having $\mathrm{TE}_{10}$ mode as dominant mode is having a cutoff frequency of $18-\mathrm{GHz}$ for the $\mathrm{TE}_{w,}$ mode. The inner broad...
0 votes
0 answers
1251
GATE ECE 2006 | Question: 70
A mast antenna consisting of a $50$ meter long vertical conductor operates over a perfectly conducting ground plane. It is base-fed at a frequency of $600-\mathrm{kHz}$. The radiation resistance of the antenna in ohms is $\frac{2 \pi^{2}}{5}$ $\frac{\pi^{2}}{5}$ $\frac{4 \pi^{2}}{5}$ $20 \pi^{2}$
A mast antenna consisting of a $50$ meter long vertical conductor operates over a perfectly conducting ground plane. It is base-fed at a frequency of $600-\mathrm{kHz}$. ...
0 votes
0 answers
1252
GATE ECE 2006 | Question: 71
Common Data for Questions 71, 72,73: In the transistor amplifier circuit shown in the figure below, the transistor has the following parameters: \[ \beta_{\mathrm{DC}}=60, \mathrm{~V}_{\mathrm{BE}}=0.7 \mathrm{~V}, h_{n^{c}} \longrightarrow \infty, h_{ ... $4.8$ Volts $5.3$ Volts $6.0$ Volts $6.6$ Volts
Common Data for Questions 71, 72,73:In the transistor amplifier circuit shown in the figure below, the transistor has the following parameters:\[ \beta_{\mathrm{DC}}=60, ...
0 votes
0 answers
1255
GATE ECE 2006 | Question: 74
Common Data for Questions 74, 75: Let $g(t)=p(t)^{*} p(t)$, where * denotes convolution and $p(t)=u(t)-u(t-1)$ with $u(t)$ being the unit step function The impulse response of filter matched to the signal $s(t)=g(t)-\delta(t-2)^{*} g(t)$ is given as $s(1-t)$ $-s(1-t)$ $-s(t)$ $s(t)$
Common Data for Questions 74, 75:Let $g(t)=p(t)^{*} p(t)$, where * denotes convolution and $p(t)=u(t)-u(t-1)$ with $u(t)$ being the unit step functionThe impulse response...
0 votes
0 answers
1260
GATE ECE 2006 | Question: 79
Statement for Linked Answer Questions 78 and 79 The following two questions refer to wide sense stationary stochastic processes The parameters of the system obtained in $\text{Q.78}$ would be first order $\text{R-L}$ ... lowpass filter would have $\mathrm{R}=1 \Omega, \mathrm{L}=4 \mathrm{H}, \mathrm{C}=4 \mathrm{F}$
Statement for Linked Answer Questions 78 and 79The following two questions refer to wide sense stationary stochastic processesThe parameters of the system obtained in $\t...
0 votes
0 answers
1261
GATE ECE 2006 | Question: 80
Statement for Linked Answer Questions 80 and 81 Consider the following Amplitude Modulated (AM) signal, where $f_{m}<\mathrm{B}$ \[x_{\mathrm{AM}}(t)=10\left(1+0.5 \sin 2 \pi f_{m} t\right) \cos 2 \pi f_{c} t\] The average side-band power for the $\text{AM}$ signal given above is $25$ $12.5$ $6.25$ $3.125$
Statement for Linked Answer Questions 80 and 81Consider the following Amplitude Modulated (AM) signal, where $f_{m}<\mathrm{B}$\[x_{\mathrm{AM}}(t)=10\left(1+0.5 \sin 2 \...
0 votes
0 answers
1263
GATE ECE 2006 | Question: 82
Statement for Linked Answer Questions 82 and 83 Consider a unity-gain feedback control system whose open-loop transfer function is \[G(s)=\frac{as+1}{s^{2}}\] The value of '$a$' so that the system has a phase-margin equal to $\frac{\pi}{4}$ is approximately equal to $2.40$ $1.40$ $0.84$ $0.74$
Statement for Linked Answer Questions 82 and 83Consider a unity-gain feedback control system whose open-loop transfer function is\[G(s)=\frac{as+1}{s^{2}}\]The value of '...
0 votes
0 answers
1267
GATE ECE 1994 | Question 1.1
The Laplace transform of a unit ramp function starting at $t=a$, is $\frac{1}{(s+a)^{2}}$ $\frac{e^{-as}}{(s+a)^{2}}$ $\frac{e^{-as}}{s^{2}}$ $\frac{a}{s^{2}}$
The Laplace transform of a unit ramp function starting at $t=a$, is$\frac{1}{(s+a)^{2}}$$\frac{e^{-as}}{(s+a)^{2}}$$\frac{e^{-as}}{s^{2}}$$\frac{a}{s^{2}}$
0 votes
0 answers
1268
GATE ECE 1994 | Question: 1.2
The Fourice Series of a odd periọdic function, contains only odd harmonics even harmonics cosine terms sine terms
The Fourice Series of a odd periọdic function, contains onlyodd harmonicseven harmonicscosine termssine terms
0 votes
0 answers
1269
GATE ECE 1994 | Question 1.3
A series $\text{LCR}$ circuit consisting of $R=10 \; \Omega$, $\left|X_{L}\right|=20 \; \Omega$ and $\left|X_{C}\right|=20 \; \Omega$, is connected across an $a . c$. supply of $200 \text{V rms}$ . The $\text{rms}$ ... $400 \; \angle-90^{\circ} \; \mathrm{V}$ $400 \; \angle-90^{\circ} \; \mathrm{V}$
A series $\text{LCR}$ circuit consisting of $R=10 \; \Omega$, $\left|X_{L}\right|=20 \; \Omega$ and $\left|X_{C}\right|=20 \; \Omega$, is connected across an $a . c$. sup...
0 votes
0 answers
1270
GATE ECE 1994 | Question 1.4
A ramp voltage, $v(t)=100$ volts, is applied to an $R C$ differentiating circuit with $R=5 \; \mathrm{k} \Omega$ and $C=4$ $\mu \mathrm{F}$. The maximum output voltage is $0.2$ volts $2.0$ volts $10.0$ volts $50.0$ volts
A ramp voltage, $v(t)=100$ volts, is applied to an $R C$ differentiating circuit with $R=5 \; \mathrm{k} \Omega$ and $C=4$ $\mu \mathrm{F}$. The maximum output voltage is...
0 votes
0 answers
1271
GATE ECE 1994 | Question 1.5
The $3-d \mathrm{B}$ bandwidth of a typical second-order system with the transfer function $\frac{\mathrm{C}(s)}{\mathrm{R}(s)}=\frac{w_{n}^{2}}{s^{2} \mathrm{t}+2 x w_{n} s+w_{n}^{2}}$ is given by $\omega_{n}=\sqrt{1-2 \xi^{2}}$ ... $\omega_{n}=\sqrt{\left.1-2 \xi^{2}\right)+\sqrt{4 \xi^{4}-4 \xi^{2}+2}}$
The $3-d \mathrm{B}$ bandwidth of a typical second-order system with the transfer function$\frac{\mathrm{C}(s)}{\mathrm{R}(s)}=\frac{w_{n}^{2}}{s^{2} \mathrm{t}+2 x w_{n}...
0 votes
0 answers
1272
GATE ECE 1994 | Question 1.6
If the open-loop transfer function is a ratio of a numerator polynomial of degree ' $m$ ' and a denominator polynomial of degree '$n$', then the integer $(n-m)$ represents the number of breakaway points unstable poles separate root loci asymtotes
If the open-loop transfer function is a ratio of a numerator polynomial of degree ' $m$ ' and a denominator polynomial of degree '$n$', then the integer $(n-m)$ represent...
0 votes
0 answers
1274
GATE ECE 1994 | Question 1.8
The threshold voltage of an $n$ channel $\text{MOSFET}$ can be increased by increasing the channel dopant concentration reducing the channel dopant concentration reducing the gate-oxide thickness reducing the channel length
The threshold voltage of an $n$ channel $\text{MOSFET}$ can be increased byincreasing the channel dopant concentrationreducing the channel dopant concentrationreducing th...
0 votes
0 answers
1275
GATE ECE 1994 | Question 1.9
A class - A transformer coupled, transistor power amplifier is required to deliver a power output of $10$ watts. The maximum power rating of the transistor should not be less than $5 \mathrm{~W}$ $10 \mathrm{~W}$ $20 \mathrm{~W}$ $40 \mathrm{~W}$
A class - A transformer coupled, transistor power amplifier is required to deliver a power output of $10$ watts. The maximum power rating of the transistor should not be ...
0 votes
0 answers
1276
GATE ECE 1994 | Question 1.10
Data can be changed from spatial code to temporal code and vice-versa by using $\text{ADC}$s and $\text{DAC}$s shift-registers synchronous counters timers
Data can be changed from spatial code to temporal code and vice-versa by using$\text{ADC}$s and $\text{DAC}$sshift-registerssynchronous counterstimers
0 votes
0 answers
1277
GATE ECE 1994 | Question 1.11
The output of a logic gate is ‘$1$’ when all its inputs are at logic ‘$0$’. Then gate is either a $\text{NAND}$ or an $\text{EX-OR}$ gate a $\text{NOR}$ or an $\text{EX-NOR}$ gate an $\text{OR}$ or an $\text{EX-NOR}$ gate an $\text{AND}$ or an $\text{EX-OR}$ gate
The output of a logic gate is ‘$1$’ when all its inputs are at logic ‘$0$’. Then gate is eithera $\text{NAND}$ or an $\text{EX-OR}$ gatea $\text{NOR}$ or an $\tex...
0 votes
0 answers
1278
GATE ECE 1994 | Question 1.12
A $\text{PLA}$ can be used as a microprocessor as a dynamic memory to realise a sequential logic to realise a combinational logic
A $\text{PLA}$ can be usedas a microprocessoras a dynamic memoryto realise a sequential logicto realise a combinational logic
0 votes
0 answers
1279
GATE ECE 1994 | Question 1.13
A dynamic $\text{RAM}$ consists of $6$ transistors $2$ transistors and $2$ capacitors $1$ transistor and $1$ capacitor $2$ capacitors only
A dynamic $\text{RAM}$ consists of$6$ transistors$2$ transistors and $2$ capacitors$1$ transistor and $1$ capacitor$2$ capacitors only
0 votes
0 answers
1280
GATE ECE 1994 | Question 1.14
$v(t)=5[\cos (106 \; \pi t)-\sin (103 \; \pi t) \times \sin (106 \; \pi t)$ represents $\text{DSB}$ suppressed carrier signal $\text{AM}$ signal $\text{SSB}$ upper sideband signal Narrow band $\text{FM}$ signal
$v(t)=5[\cos (106 \; \pi t)-\sin (103 \; \pi t) \times \sin (106 \; \pi t)$ represents$\text{DSB}$ suppressed carrier signal$\text{AM}$ signal$\text{SSB}$ upper sideband ...
Page: