Register
Filter

Recent questions in Others

0 votes
0 answers
1561
GATE ECE 1992 | Question 1.36
A transmission line whose characteristic impedance is a pure resistance must be a lossless line must be a distortionless line may not be a lossless line $(d)$ may not be a distortionless line.
A transmission line whose characteristic impedance is a pure resistancemust be a lossless linemust be a distortionless linemay not be a lossless line$(d)$ may not be a di...
0 votes
0 answers
1563
GATE ECE 1992 | Question 1.38
Two dissimilar antennas having their maximum directivities equal, must have their beamwidths also equal cannot have their beamwidths equal because they are dissimilar antennas may not necessarily have their maximum power gains equal must have their effictive aperture areas (capture areas) also equal.
Two dissimilar antennas having their maximum directivities equal,must have their beamwidths also equalcannot have their beamwidths equal because they are dissimilar anten...
0 votes
0 answers
1564
GATE ECE 1992 | Question 1.39
The beamwidth-between-first null of uniform linear array of $\mathrm{N}$ equally-spaced (element spacing $=d$ ), equally-excited antennas is determined by $\mathrm{N}$ alone and not by $d$ $d$ alone and not by $\mathrm{N}$ the ratio, $(\mathrm{N} / d)$ the product, $(\mathrm{N} d)$
The beamwidth-between-first null of uniform linear array of $\mathrm{N}$ equally-spaced (element spacing $=d$ ), equally-excited antennas is determined by$\mathrm{N}$ alo...
0 votes
0 answers
1565
GATE ECE 1992 | Question 1.40
In a multicavity magnetron, strapping is employed primarily to prevent mode jumping to increase the separation between the resonant frequencies in the $\pi$-mode and in the adjacent modes to reduce the back heating of the cathode to increase the output of the magnetron.
In a multicavity magnetron, strapping is employed primarilyto prevent mode jumpingto increase the separation between the resonant frequencies in the $\pi$-mode and in the...
0 votes
0 answers
1566
GATE ECE 1991 | Question 1.1
An excitation is applied to a system at $\mathrm{t}=\mathrm{T}$ and its response is zero for $-\infty<t<T$. Such a system is non-causal system stable system causal system unstable system
An excitation is applied to a system at $\mathrm{t}=\mathrm{T}$ and its response is zero for $-\infty<t<T$. Such a system isnon-causal systemstable systemcausal systemuns...
0 votes
0 answers
1567
GATE ECE 1991 | Question 1.2
In a series RLC high $Q$ circuit, the current peaks at a frequency equal to the resonant frequency greater than the resonant frequency less than the resonant frequency none of the above
In a series RLC high $Q$ circuit, the current peaks at a frequencyequal to the resonant frequencygreater than the resonant frequencyless than the resonant frequencynone o...
0 votes
0 answers
1569
GATE ECE 1991 | Question 1.4
Two two-port networks are connected in cascade. The combination is to be represented as a single two-port network. The parameters of the network are obtained by multiplying the individual $z$-parameter matrix $h$-parameter matrix $y$-parameter matrix $\text{ABCD}$ parameter matrix
Two two-port networks are connected in cascade. The combination is to be represented as a single two-port network. The parameters of the network are obtained by multiplyi...
0 votes
0 answers
1570
GATE ECE 1991 | Question 1.5
The pole-zero pattern of a certain filter is shown in the figure below. The filter must be of the following type. low pass high pass all pass band pass
The pole-zero pattern of a certain filter is shown in the figure below. The filter must be of the following type.low passhigh passall passband pass
0 votes
0 answers
1572
GATE ECE 1991 | Question 1.7
In the signal flow graph of Figure, the gain $c / r$ will be $\frac{11}{9}$ $\frac{22}{15}$ $\frac{24}{23}$ $\frac{44}{23}$
In the signal flow graph of Figure, the gain $c / r$ will be$\frac{11}{9}$$\frac{22}{15}$$\frac{24}{23}$$\frac{44}{23}$
0 votes
0 answers
1573
GATE ECE 1991 | Question 1.8
A second order system has a transfer function given by $ G(s)=\frac{25}{s^2+8 s+25} $ If the system, initially at rest is subjected to a unit step input at $\mathrm{t}=0$, the second peak in response will occur at $\pi \mathrm{sec}$ $\frac{\pi}{3}$ sec $\frac{2 \pi}{3} \sec$ $\frac{\pi}{2}$ sec
A second order system has a transfer function given by$$ G(s)=\frac{25}{s^2+8 s+25} $$If the system, initially at rest is subjected to a unit step input at $\mathrm{t}=0$...
0 votes
0 answers
1574
GATE ECE 1991 | Question 1.9
The open loop transfer function of a feedback control system is: $ G(s) H(s)=\frac{1}{(s+1)^3} $ The gain margin of the system is: $2$ $4$ $8$ $16$
The open loop transfer function of a feedback control system is:$$ G(s) H(s)=\frac{1}{(s+1)^3} $$The gain margin of the system is:$2$$4$$8$$16$
0 votes
0 answers
1575
GATE ECE 1991 | Question 1.10
A unity feedback control system has the open loop transfer function $ G(s)=\frac{4(1+2 s)}{s^2(s+2)} $ If the input to the system is a unit ramp, the steady state error will be $0$ $0.5$ $2$ $\textsf{infinity}$
A unity feedback control system has the open loop transfer function$$ G(s)=\frac{4(1+2 s)}{s^2(s+2)} $$If the input to the system is a unit ramp, the steady state error w...
0 votes
0 answers
1577
GATE ECE 1991 | Question 1.12
A linear second order single input continuous time system is described by the following set of differential equations ... and $u(t)$ is the control variable. The system is: controllable and stable controllable but unstable uncontrollable and unstable uncontrollable and stable
A linear second order single input continuous time system is described by the following set of differential equations$$ \begin{aligned} &x_1(t)=-2 x_1(t)+4 x_2(t) \\ &x_2...
0 votes
0 answers
1579
GATE ECE 1991 | Question 1.14
A silicon sample is uniformly doped with $10^{16}$ phosphorous atoms $/ \mathrm{cm}^3$ and $2 \times 10^{16}$ boron atoms $/ \mathrm{cm}^3$. If all the dopants are fully ionized, the material is $\mathrm{n}$ ... $2 \times 10^{16} / \mathrm{cm}^3$ $T_2$ will get damaged and $T_1$ will be safe
A silicon sample is uniformly doped with $10^{16}$ phosphorous atoms $/ \mathrm{cm}^3$ and $2 \times 10^{16}$ boron atoms $/ \mathrm{cm}^3$. If all the dopants are fully ...
0 votes
0 answers
1580
GATE ECE 1991 | Question 1.15
An $n$-type silicon sample, having electron mobility $\mu_n=$ twice the hole mobility $\mu_p$, is subjected to a steady illumination such that the electron concentration doubles from its thermal equilibrium value. As a result, the conductivity of the sample increases by a factor of ...
An $n$-type silicon sample, having electron mobility $\mu_n=$ twice the hole mobility $\mu_p$, is subjected to a steady illumination such that the electron concentration ...
0 votes
0 answers
1581
GATE ECE 1991 | Question 1.16
The small signal capacitances of an abrupt $P_1-n$ junction is $1 \mathrm{nF} / \mathrm{Cm}^2$ at zero bias. If the built in voltage is $1$ volt, the capacitance at a reverse bias voltage of $99$ volts is equal to $\ldots$
The small signal capacitances of an abrupt $P_1-n$ junction is $1 \mathrm{nF} / \mathrm{Cm}^2$ at zero bias. If the built in voltage is $1$ volt, the capacitance at a rev...
0 votes
0 answers
1584
GATE ECE 1991 | Question 1.19
The built-in potential of the gate junction of a $n$-channel $\text{JFET}$ is $0.5$ volts. The drain current saturates at $V_{D S}=4.0$ volts when $V_{G S}=0$. The pinch off voltage is _________.
The built-in potential of the gate junction of a $n$-channel $\text{JFET}$ is $0.5$ volts. The drain current saturates at $V_{D S}=4.0$ volts when $V_{G S}=0$. The pinch ...
0 votes
0 answers
1585
GATE ECE 1991 | Question 1.20
In figure, all transistors are identical and have a high value of beta. The voltage $V_{D C}$ is equal to _________.
In figure, all transistors are identical and have a high value of beta. The voltage $V_{D C}$ is equal to_________.
0 votes
0 answers
1586
GATE ECE 1991 | Question 1.21
In figure, both transistors are identical and have a high value of beta. Take the $dc$ base-emitter voltage drop as $0.7$ volt and $\mathrm{KT} / \mathrm{q}=25 \; \mathrm{mV}$. The small signal low frequency voltage gain $\left(V_o / V_i\right)$ is equal to__________.
In figure, both transistors are identical and have a high value of beta. Take the $dc$ base-emitter voltage drop as $0.7$ volt and $\mathrm{KT} / \mathrm{q}=25 \; \mathrm...
0 votes
0 answers
1587
GATE ECE 1991 | Question 1.22
In figure the input $V_1$ is a $100 \mathrm{~Hz}$ triangular wave having a peak to peak amplitude of 2 volts and an average value of zero volts. Given that the diode is ideal, the average value of the output $V_0$ is ___________.
In figure the input $V_1$ is a $100 \mathrm{~Hz}$ triangular wave having a peak to peak amplitude of 2 volts and an average value of zero volts. Given that the diode is i...
0 votes
0 answers
1589
GATE ECE 1991 | Question 1.24
In order that the circuit of Figure works properly as differentiator, it should be modified to ________ (draw the modified circuit)
In order that the circuit of Figure works properly as differentiator, it should be modified to ________ (draw the modified circuit)
0 votes
0 answers
1590
GATE ECE 1991 | Question 1.25
Two non-inverting amplifiers, one having a unity gain and the other having a gain of twenty are made using identical operational amplifiers. As a compared to the unity gain amplifier, the amplifier with gain twenty has less negative feedback greater input impedance less bandwidth none of the above
Two non-inverting amplifiers, one having a unity gain and the other having a gain of twenty are made using identical operational amplifiers. As a compared to the unity ga...
0 votes
0 answers
1591
GATE ECE 1991 | Question 1.26
Two dimensional addressing of $256 \times 8$ bit $\text{ROM}$ using to $1$ selectors requires ________ (how many?) $\text{NAND}$ gates.
Two dimensional addressing of $256 \times 8$ bit $\text{ROM}$ using to $1$ selectors requires ________ (how many?) $\text{NAND}$ gates.
0 votes
0 answers
1592
GATE ECE 1991 | Question 1.27
The $\textsf{CMOS}$ equivalent of the following $\textsf{nMOS}$ gate (in figure) is___________ (draw the circuit).
The $\textsf{CMOS}$ equivalent of the following $\textsf{nMOS}$ gate (in figure) is___________ (draw the circuit).
0 votes
0 answers
1593
GATE ECE 1991 | Question 1.28
In figure, the Boolean expression for the output in terms of inputs $A, B$ and $C$ when the clock $\textsf{'CK'}$ is high, is given by __________.
In figure, the Boolean expression for the output in terms of inputs $A, B$ and $C$ when the clock $\textsf{'CK'}$ is high, is given by __________.
0 votes
0 answers
1594
GATE ECE 1991 | Question 1.29
An $\text{S-R FLIP-FLOP}$ can be converted into a $\textsf{T FLIP FLOP}$ by connecting __________ to $\mathrm{Q}$ and ___________ to $\mathrm{Q}$.
An $\text{S-R FLIP-FLOP}$ can be converted into a $\textsf{T FLIP FLOP}$ by connecting __________ to $\mathrm{Q}$ and ___________ to $\mathrm{Q}$.
0 votes
0 answers
1595
GATE ECE 1991 | Question 1.30
A bit stored in a $\text{FAMOS}$ device can be erased by _____________.
A bit stored in a $\text{FAMOS}$ device can be erased by _____________.
0 votes
0 answers
1596
GATE ECE 1991 | Question 1.31
A signal has frequency components from $300 \mathrm{~Hz}$ to $1.8 \; \mathrm{KHz}$. The minimum possible rate at which the signal has to be sampled is ___________.
A signal has frequency components from $300 \mathrm{~Hz}$ to $1.8 \; \mathrm{KHz}$. The minimum possible rate at which the signal has to be sampled is ___________.
0 votes
0 answers
1598
GATE ECE 1991 | Question 1.33
For the signal constellation shown in figure below, the type of modulation is ___________.
For the signal constellation shown in figure below, the type of modulation is ___________.
0 votes
0 answers
1599
GATE ECE 1991 | Question 1.34
Two resistors $R_1$ and $R_2$ (in ohms) at temperatures $T_1$ and $T_2 K$ respectively, are connected in series. Their equivalent noise temperatures is ___________ $K$.
Two resistors $R_1$ and $R_2$ (in ohms) at temperatures $T_1$ and $T_2 K$ respectively, are connected in series. Their equivalent noise temperatures is ___________ $K$.
0 votes
0 answers
1600
GATE ECE 1991 | Question 1.35
A binary source has symbol probabilities $0.8$ and $0.2$. If extension coding (blocks of $4$ symbols) is used. The lower and upper bounds on the average code word length are (a) lower _________. (b) higher ________.
A binary source has symbol probabilities $0.8$ and $0.2$. If extension coding (blocks of $4$ symbols) is used. The lower and upper bounds on the average code word length ...
Page: