Recent activity - GO Electronics

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GATE2014-2-24
To maximum power transfer, a lossless transmission line is to be matched to a resistive load impedance via a $\lambda/4$ transformer as shown. The characteristic impedance (in $\Omega$) of the $\lambda$/4 transformer is ___________.

retagged 22 hours ago in Others by soujanyareddy13 (100 points)

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GATE2014-2-23
Consider sinusoidal modulation in an AM system. Assuming no overmodulation, the modulation index ($\mu$) when the maximum and minimum values of the envelope, respectively, are $3$ V and $1$ V, is ___________.

retagged 22 hours ago in Others by soujanyareddy13 (100 points)

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GATE2014-2-22
The capacity of a band-limited additive white Gaussian noise (AWGN) channel is given by $C = W \log_{2}\left ( 1+\frac{p} {\sigma ^{2}w} \right )$ bits per second (bps), where $W$ is the channel bandwidth, $P$ ... $(W\rightarrow \infty )$ is approximately $1.44$ $1.08$ $0.72$ $0.36$

retagged 22 hours ago in Others by soujanyareddy13 (100 points)

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GATE2014-2-21
For the following system, when $X_{1} (s) = 0$, the transfer function $\frac{Y(s)}{X_{2}(s)}$ is $\frac{s+1}{s^{2}}\\ $ $\frac{1}{s+1} \\$ $\frac{s+2}{s(s+1)} \\$ $\frac{s+1}{s(s+2)}$

retagged 22 hours ago in Others by soujanyareddy13 (100 points)

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GATE2014-2-20
The natural frequency of an undamped second-order system is $40$ rad/s. If the system is damped with a damping ratio $0.3$, the damped natural frequency in $rad/s$ is ___________.

retagged 22 hours ago in Others by soujanyareddy13 (100 points)

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GATE2014-2-19
Consider the periodic square wave in the figure shown. The ratio of the power in the $7^{th}$ harmonic to the power in the $5^{th}$ harmonic for this waveform is closest in value to ________.

retagged 22 hours ago in Others by soujanyareddy13 (100 points)

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GATE2014-2-18
Let $x[n] = x[-n]$. Let $X(z)$ be the $z$-transform of $x[n]$. If $0.5 + j 0.25$ is a zero of $X(z)$, which one of the following must also be a zero of $x(z)$ $0.5 – j 0.25$ $1/(0.5 + j 0.25)$ $1/(0.5 – j 0.25)$ $2+j 4$

retagged 22 hours ago in Others by soujanyareddy13 (100 points)

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GATE2014-2-17
As FIR system is described by the system function $ H(z) = 1 + \frac{7}{2} z^{-1} + \frac{3}{2}z^{-2}$. The system is maximum phase minimum phase mixed phase zero phase

retagged 22 hours ago in Others by soujanyareddy13 (100 points)

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GATE2014-2-16
In a half-subtractor circuit with $X$ and $Y$ as inputs, the Borrow $(M)$ and Difference $(N = X – Y)$ are given by $M = X \oplus Y, \: \: \: N = XY$ $M = XY, \: \: \:N = X \oplus Y$ $M = \overline{ X}Y, \: \: \: N =X \oplus Y$ $M = X \overline{ Y}, \: \: \: N = \overline{X \oplus Y}$

retagged 22 hours ago in Others by soujanyareddy13 (100 points)

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GATE2014-2-15
The number of bytes required to represent the decimal number $1856357$ in packed BCD (Binary Coded Decimal) form is ___________.

retagged 23 hours ago in Others by soujanyareddy13 (100 points)

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11

GATE2014-2-14
For an $n$-variable Boolean function, the maximum number of prime implicants is $2(n-1)$ $n/2$ $2^{n}$ $2^{n-1}$

retagged 23 hours ago in Others by soujanyareddy13 (100 points)

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GATE2014-2-13
A cascade connection of two voltage amplifier $A1$ and $A2$ is shown in the figure. The open-loop gain $A_{V0}$, input resistance $R_{in}$, and output resistance $R_{o}$ for A1 and A2 are as follows: $A1: A_{V0} = 10, R_{in} = 10k \Omega, R_{o} = 1k\Omega$ $A2: A_{V0} = 5, R_{in} = 5k \Omega, R_{o} =200\Omega$ The approximate overall voltage gain $V_{out}/V_{in}$ is __________.

retagged 23 hours ago in Others by soujanyareddy13 (100 points)

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GATE2014-2-12
In the differential amplifier shown in the figure, the magnitude of the common-mode and differential-mode gains are $A_{CM}$ and $A_{d},$ respectively. If the resistance $R_{E}$ is increased, then $A_{cm}$ increases common-mode rejection ratio increases $A_{d}$ increases common-mode rejection ratio decreases

retagged 23 hours ago in Others by soujanyareddy13 (100 points)

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GATE2014-2-11
The feedback topology in the amplifier circuit ( the base bias circuit is not shown for simplicity) in the figure is voltage shunt feedback current series feedback current shunt feedback voltage series feedback

retagged 23 hours ago in Others by soujanyareddy13 (100 points)

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15

GATE2014-2-10
In CMOS technology, shallow P-well or N-well regions can be formed using low pressure chemical vapour deposition low energy sputtering low temperature dry oxidation low energy ion-implantation

retagged 23 hours ago in Others by soujanyareddy13 (100 points)

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16

GATE2014-2-9
An increase in the base recombination of a BJT will increase the common emitter dc current gain $\beta$ the breakdown voltage $BV_{CEO}$ the unity-gain cut-off frequency $f_{T}$ the transconductance $g_{m}$

retagged 23 hours ago in Others by soujanyareddy13 (100 points)

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17

GATE2014-2-8
A silicon bar is doped with donor impurities $N_{D}= 2.25 \times 10^{15} \text{atoms} / cm^{3}$. Given the intrinsic carrier concentration of silicon at $T = 300 \: K$ is $n_{i}= 1.5 \times 10^{10} cm^{-3}.$ Assuming complete impurity ionization, the equilibrium electron and hole ... $n_{0}=2.25\times 10^{15}cm^{-3}, \: p_{0}= 1\times 10^{5}cm^{-3}$

retagged 23 hours ago in Others by soujanyareddy13 (100 points)

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18

GATE2014-2-6
Norton’s theorem states that a complex network connected to a load can be replaced with an equivalent impedance in series with a current source in parallel with a voltage source in series with a voltage source in parallel with a current source

retagged 2 days ago in Others by soujanyareddy13 (100 points)

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19

GATE2014-2-5
If the characteristic equation of the differential equation $\frac{\mathrm{d}^2 y}{\mathrm{dx}^2}+2\alpha \frac{\mathrm{d}y}{\mathrm{d} x}+y= 0$ has two equal roots, then the value of $\alpha$ are $\pm 1$ $0,0$ $\pm j$ $\pm 1/2$

retagged 2 days ago in Others by soujanyareddy13 (100 points)

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20

GATE2014-2-4
The value of $\lim_{x\rightarrow \infty }(1 +\tfrac{1}{x})^{x}$ is $\text{ln }2$ $1.0$ $e$ $\infty$

retagged 2 days ago in Others by soujanyareddy13 (100 points)

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21

GATE2014-2-3
For $0 \leq t < \infty ,$ the maximum value of the function $f(t)= e^{-t}-2e^{-2t}$ occurs at $t= log_{e}4$ $t= log_{e}2$ $t= 0$ $t= log_{e}8$

retagged 2 days ago in Others by soujanyareddy13 (100 points)

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22

GATE2014-2-GA-10
It takes $30$ minutes to empty a half-full tank by draining it at a constant rate. It is decided to simultaneously pump water into the half-full tank while draining it. What is the rate at which water has to be pumped in so that it gets fully filled in $10$ minutes? $4$ times the draining rate $3$ times the draining rate $2.5$ times the draining rate $2$ times the draining rate

retagged 2 days ago in Numerical Ability by soujanyareddy13 (100 points)

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23

GATE2014-2-GA-9
The total exports and revenues from the exports of a country are given in the two charts shown below. The pie chart for exports shows the quantity of each item exported as a percentage of the total quantity of exports. The pie chart for the revenues shows the percentage ... Which item among the following has generated the maximum revenue per $kg$? Item $2$ Item $3$ Item $6$ Item $5$

retagged 2 days ago in Numerical Ability by soujanyareddy13 (100 points)

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24

GATE2014-2-GA-7
Lights of four colors (red, blue, green, yellow) are hung on a ladder. On every step of the ladder, there are two lights. If one of the lights is red, the other light on that step will always be blue. If one of the lights on a step is green, the ... equal to the sum of the yellow and blue lights The sum of the red and blue lights is equal to the sum of the green and yellow lights

retagged 2 days ago in Verbal Ability by soujanyareddy13 (100 points)

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25

GATE2014-2-GA-6
Find the odd one in the following group Q,W,Z,B B,H,K,M W,C,G,J M,S,V,X Q,W,Z,B B,H,K,M W,C,G,J M,S,V,X

retagged 2 days ago in Numerical Ability by soujanyareddy13 (100 points)

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26

GATE2014-2-GA-4
A regular die has six sides with numbers $1$ to $6$ marked on its sides. If a very large number of throws show the following frequencies of occurrence: $1 \rightarrow 0.167$; $2 \rightarrow 0.167$; $3 \rightarrow 0.152$; $4 \rightarrow 0.166$; $5 \rightarrow 0.168$; $6 \rightarrow 0.180$. We call this die irregular biased Gaussian insufficient

retagged 2 days ago in Numerical Ability by soujanyareddy13 (100 points)

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27

GATE2014-2-GA-3
Choose the most appropriate pair of words from the options given below to complete the following sentence. She could not _________ the thought of _________ the election to her bitter rival. bear, loosing bare, loosing bear, losing bare, losing

retagged 2 days ago in Verbal Ability by soujanyareddy13 (100 points)

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28

GATE2014-2-GA-2
Which of the options given below best completes the following sentence? She will feel much better if she ________________. will get some rest gets some rest will be getting some rest is getting some rest

retagged 2 days ago in Verbal Ability by soujanyareddy13 (100 points)

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29

GATE2014-2-GA-1
Choose the most appropriate word from the options given below to complete the following sentence. Communication and interpersonal skills are__________ important in their own ways. each both all either

retagged 2 days ago in Verbal Ability by soujanyareddy13 (100 points)

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30

GATE2014-1-30
A $Y$-network has resistances of $10\Omega$ each in two of its arms, while the third arm has a resistance of $11\Omega.$ In the equivalent $\Delta$ – network, the lowest value (in $\Omega)$ among the three resistances is ______.

retagged 2 days ago in Others by soujanyareddy13 (100 points)

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31

GATE2014-1-29
Consider the matrix ... $\alpha$ is a non-negative real number. The value of $\alpha$ for which $\text{det(P)} = 0$ is _______.

retagged 2 days ago in Others by soujanyareddy13 (100 points)

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32

GATE2014-1-28
The volume under the surface $z(x,y) = x + y$ and above the triangle in the $x – y$ plane defined by $\{0 \leq y \leq x \: \text{and} \: 0 \leq x \leq 12\}$ is _______.

retagged 2 days ago in Others by soujanyareddy13 (100 points)

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33

GATE2014-1-27
For a function $g(t),$ it is given that $\int_{- \infty}^{ + \infty} g(t)e^{-j\omega t}\:dt = \omega e^{-2\omega^{2}}$ for any real value $\omega.$ If $y(t) = \int_{- \infty}^{t}\:g(\tau)\:d\tau,$ then $\int_{- \infty}^{ + \infty}y(t)dt$ is $0$ $-j$ $-\frac{j}{2}$ $\frac{j}{2}$

retagged 2 days ago in Others by soujanyareddy13 (100 points)

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34

GATE2014-1-23
The capacity of a Binary Symmetric Channel $\text{(BSC)}$ with cross-over probability $0.5$ is ________.

retagged 2 days ago in Others by soujanyareddy13 (100 points)

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35

GATE2014-1-18
Consider two real valued signals, $x(t)$ band-limited to $[-500\:Hz,500\:Hz]$ and $y(t)$ band-limited to $[-1\:kHz,1\:kHz].$ For $z(t) = x(t)\cdot y(t),$ the Nyquist sampling frequency (in $kHz$) is _______.

retagged 2 days ago in Others by soujanyareddy13 (100 points)

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36

GATE2014-1-13
In the low-pass filter shown in the figure, for a cut-off frequency of $5\:kHz,$ the value of $R_{2}\:(\text{in}\:k\Omega)$ is ______.

retagged 2 days ago in Others by soujanyareddy13 (100 points)

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37

GATE2014-1-8
When the optical power incident on a photodiode is $10\:\mu W$ and the responsivity is $0.8\: A/ W,$ the photocurrent generated $(\text{in} \:\mu A)$ is_______.

retagged 2 days ago in Others by soujanyareddy13 (100 points)

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38

GATE2014-1-5
Let $X_{1},X_{2},$ and $X_{3}$ be independent and identically distributed random variables with the uniform distribution on $[0,1].$ The probability $P\{X_{1}\: \text{is the largest}\}$ is ________.

retagged 2 days ago in Others by soujanyareddy13 (100 points)

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39

GATE2014-2-1
The determinant of matrix $A$ is $5$ and the determinant of matrix B is $40$. The determinant of matrix $AB$ is ________

retagged 4 days ago in Others by soujanyareddy13 (100 points)

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40

GATE2014-1-25
The force on a point charge $+q$ kept at a distance $d$ from the surface of an infinite grounded metal plate in a medium of permittivity $\epsilon\:$ is $0$ $\dfrac{q^{2}}{16\pi \epsilon d^{2}}$ away from the plate $\dfrac{q^{2}}{16\pi \epsilon d^{2}}$ towards the plate $\dfrac{q^{2}}{4\pi \epsilon d^{2}}$ towards the plate

retagged 4 days ago in Others by soujanyareddy13 (100 points)