Recent activity by admin / GO Instrumentation

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1

GATE IN 2024 | Question: 1
Let $\boldsymbol{z}=x+i y$ be a complex variable and $\overline{\boldsymbol{z}}$ be its complex conjugate. The equation $\bar{z}^{2}+z^{2}=2$ represents a parabola hyperbola ellipse circle

Let $\boldsymbol{z}=x+i y$ be a complex variable and $\overline{\boldsymbol{z}}$ be its complex conjugate. The equation $\bar{z}^{2}+z^{2}=2$ represents aparabolahyperbol...

asked Feb 16

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2

GATE IN 2024 | Question: 2
The pressure drop across a control valve is constant. The control valve with inherent characteristic has decreasing sensitivity. If $x$ represents the fraction of maximum stem position of the control valve, then the function $f(x)$ representing the fraction of maximum flow is $\alpha^{x-1}$, where $\alpha$ is constant $\sqrt{x}$ $x$ $x^{2}$

The pressure drop across a control valve is constant. The control valve with inherent characteristic has decreasing sensitivity. If $x$ represents the fraction of maximum...

asked Feb 16

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GATE IN 2024 | Question: 3
A discrete-time sequence is given by $x[n]=[1,2,3,4]$ for $0 \leq n \leq 3$. The zero lag auto-correlation value of $x[n]$ is $1$ $10$ $20$ $30$

A discrete-time sequence is given by $x[n]=[1,2,3,4]$ for $0 \leq n \leq 3$. The zero lag auto-correlation value of $x[n]$ is$1$$10$$20$$30$

asked Feb 16

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GATE IN 2024 | Question: 4
Match the following measuring devices with their principle of measurement. \begin{tabular}{|l|l|} \hline Measuring Device & Principle of Measurement \\ \hline (P) Optical pyrometer & (I) Variation in mutual inductance \\ \hline (Q) Thermocouple & (II) Change in resistance \\ \hline (R) Strain gauge & (III) Wavelength of radiated energy \\ ... $(\mathrm{P})-(\mathrm{II}),(\mathrm{Q})-(\mathrm{IV}),(\mathrm{R})-(\mathrm{I}),(\mathrm{S})-(\mathrm{III})$

Match the following measuring devices with their principle of measurement.\begin{tabular}{|l|l|}\hline Measuring Device & Principle of Measurement \\\hline (P) Optical py...

asked Feb 16

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GATE IN 2024 | Question: 5
The capacitor shown in the figure has parallel plates, with each plate having an area $A$. The thickness of the dielectric materials are $d_{1}$ and $d_{2}$ and their relative permittivities are $\varepsilon_{1}$ and $\varepsilon_{2}$, respectively. Assume that the fringing field effects are negligible and $\varepsilon_{0}$ is the permittivity of free ... $\frac{\varepsilon_{0} \mathrm{~A}}{\mathrm{~d}_{1}+\delta \mathrm{d}_{1}+\frac{\mathrm{d}_{2}}{\varepsilon_{2}}}$

The capacitor shown in the figure has parallel plates, with each plate having an area $A$. The thickness of the dielectric materials are $d_{1}$ and $d_{2}$ and their rel...

asked Feb 16

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GATE IN 2024 | Question: 6
Among the given options, the simplified form of the Boolean function $F=(A+\bar{A} \cdot B)+\bar{A} \cdot(A+\bar{B}) \cdot C$ is $A+B+C$ A.B.C $B+\bar{A} \cdot C$ $\bar{A}+B . C$

Among the given options, the simplified form of the Boolean function $F=(A+\bar{A} \cdot B)+\bar{A} \cdot(A+\bar{B}) \cdot C$ is$A+B+C$A.B.C$B+\bar{A} \cdot C$$\bar{A}+B ...

asked Feb 16

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GATE IN 2024 | Question: 7
Consider the state-space representation of a system \[ \dot{x}=A x+B u \] where $x$ is the state vector, $u$ is the input, $A$ is the system matrix and $B$ is the input matrix. Choose the matrix $A$ ... $\left[\begin{array}{cc}1 & 1.5 \\ 2 & -3\end{array}\right]$ $\left[\begin{array}{rr}0 & 1 \\ -2 & 3\end{array}\right]$

Consider the state-space representation of a system\[\dot{x}=A x+B u\]where $x$ is the state vector, $u$ is the input, $A$ is the system matrix and $B$ is the input matri...

asked Feb 16

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GATE IN 2024 | Question: 8
The sinusoidal transfer function corresponding to the polar plot shown in the figure, for $T>0$, is $1-j \omega T$ $\frac{1-j \omega T}{1+j \omega T}$ $1+j \omega T$ $\frac{1}{1+j \omega T}$

The sinusoidal transfer function corresponding to the polar plot shown in the figure, for $T>0$, is$1-j \omega T$$\frac{1-j \omega T}{1+j \omega T}$$1+j \omega T$$\frac{1...

asked Feb 16

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GATE IN 2024 | Question: 9
A matrix $M$ is constructed by stacking three column vectors $v_{1}, v_{2}, v_{3}$ as \[ M=\left[\begin{array}{lll} v_{1} & v_{2} & v_{3} \end{array}\right] \] Choose the set of vectors from the following options such that $\operatorname{rank}(M)=3$ ...

A matrix $M$ is constructed by stacking three column vectors $v_{1}, v_{2}, v_{3}$ as\[M=\left[\begin{array}{lll}v_{1} & v_{2} & v_{3}\end{array}\right]\]Choose the set o...

asked Feb 16

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GATE IN 2024 | Question: 10
The capacitance formed between two concentric spherical metal shells having radii $x$ and $y$ with $y>x$ is Note: $\epsilon$ is the permittivity of the medium between the shells. $4 \pi \epsilon\left(\frac{x y}{y-x}\right)$ $4 \pi \epsilon\left(\frac{x^{2}}{y-x}\right)$ $4 \pi \epsilon\left(\frac{y^{2}}{y-x}\right)$ $4 \pi \epsilon\left(\frac{y^{2}-x y}{x}\right)$

The capacitance formed between two concentric spherical metal shells having radii $x$ and $y$ with $y>x$ isNote: $\epsilon$ is the permittivity of the medium between the ...

asked Feb 16

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GATE IN 2024 | Question: 11
A linear transducer is calibrated for the ranges shown in the figure. The gain of the transducer is $\mathrm{mA} /{ }^{\circ} \mathrm{C}$ (rounded off to two decimal places).

A linear transducer is calibrated for the ranges shown in the figure. The gain of the transducer is $\mathrm{mA} /{ }^{\circ} \mathrm{C}$ (rounded off to two decimal plac...

asked Feb 16

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12

GATE IN 2024 | Question: 12
Consider a filter defined by the difference equation \[ y[n]-0.5 y[n-2]=a x[n-4] \] where $x[n]$ and $y[n]$ represent the input and output, respectively. If the magnitude response of the filter at $\omega=\frac{\pi}{2}$ is $\left|H\left(\frac{\pi}{2}\right)\right|=0.5$, the value of $a$ is (rounded off to two decimal places).

Consider a filter defined by the difference equation\[y[n]-0.5 y[n-2]=a x[n-4]\]where $x[n]$ and $y[n]$ represent the input and output, respectively. If the magnitude res...

asked Feb 16

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13

GATE IN 2024 | Question: 13
Consider the circuit shown in the figure. The CMOS digital logic circuit has infinite input impedance. Assume the opamp is ideal. A 1.8 V Zener diode with a minimum Zener current of $2 \mathrm{~mA}$ is used. The corresponding maximum value of resistance $\mathrm{Rz}$ is $\mathrm{k} \Omega$. (rounded off to one decimal place).

Consider the circuit shown in the figure.The CMOS digital logic circuit has infinite input impedance. Assume the opamp is ideal. A 1.8 V Zener diode with a minimum Zener ...

asked Feb 16

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14

GATE IN 2024 | Question: 14
Figure shows an amplifier using an NMOS transistor. Assume that the transistor is in saturation with device parameters, $\mu_{n} C_{o x}=250 \mu \mathrm{A} / \mathrm{V}^{2}$, threshold voltage $\mathrm{VT}_{\mathrm{T}}=0.65 \mathrm{~V}$ and $\mathrm{W} / \mathrm{L}=4$. Ignore the channel length modulation effect. The drain current of the transistor at the operating point is $\mu \mathrm{A}$ (rounded off to nearest integer).

Figure shows an amplifier using an NMOS transistor. Assume that the transistor is in saturation with device parameters, $\mu_{n} C_{o x}=250 \mu \mathrm{A} / \mathrm{V}^{...

asked Feb 16

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15

GATE IN 2024 | Question: 15
The number of complex multiplications required for computing a 16-point DFT using the decimation-in-time radix-2 FFT is (in integer).

The number of complex multiplications required for computing a 16-point DFT using the decimation-in-time radix-2 FFT is (in integer).

asked Feb 16

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16

GATE IN 2024 | Question: 16
A $3 \times 3$ matrix $P$ with all real elements has eigenvalues $\frac{1}{4}, 1$, and -2 . The value of $\left|P^{-1}\right|$ is (rounded off to nearest integer).

A $3 \times 3$ matrix $P$ with all real elements has eigenvalues $\frac{1}{4}, 1$, and -2 . The value of $\left|P^{-1}\right|$ is (rounded off to nearest integer).

asked Feb 16

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17

GATE IN 2024 | Question: 17
The Nyquist sampling frequency for $x(t)=10 \sin ^{2}(200 \pi t)$ is $\mathrm{Hz}$ (rounded off to nearest integer).

The Nyquist sampling frequency for $x(t)=10 \sin ^{2}(200 \pi t)$ is $\mathrm{Hz}$ (rounded off to nearest integer).

asked Feb 16

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18

GATE IN 2024 | Question: 18
The resistance of a $20 \mathrm{k} \Omega$ resistor is measured six consecutive times using an LCR meter. The first five readings are $19 \mathrm{k} \Omega, 18 \mathrm{k} \Omega, 23 \mathrm{k} \Omega, 21 \mathrm{k} \Omega$ and $17 \mathrm{k} \Omega$. If the mean of the measurements and the true value are equal, the last reading is $k \Omega$ (rounded off to nearest integer).

The resistance of a $20 \mathrm{k} \Omega$ resistor is measured six consecutive times using an LCR meter. The first five readings are $19 \mathrm{k} \Omega, 18 \mathrm{k}...

asked Feb 16

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GATE IN 2024 | Question: 19
Consider the readout circuit of a piezoelectric sensor shown in the figure. When the piezoelectric sensor generates a charge $q_{p}$, the resulting change in voltage $\mathrm{V}_{\mathrm{X}}$ is $-2 \mathrm{~V}$. Then the corresponding change in the voltage $\mathrm{V}_{\text {out }}$ is V (rounded off to nearest integer). Note: Assume all components are ideal.

Consider the readout circuit of a piezoelectric sensor shown in the figure.When the piezoelectric sensor generates a charge $q_{p}$, the resulting change in voltage $\mat...

asked Feb 16

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20

GATE IN 2024 | Question: 20
The voltage applied and the current drawn by a circuit are \[ \begin{array}{c} v(t)=95+200 \cos (120 \pi t)+90 \cos \left(360 \pi t-60^{\circ}\right) \mathrm{V} \\ i(t)=4 \cos \left(120 \pi t-60^{\circ}\right)+1.5 \cos \left(240 \pi t-75^{\circ}\right) \mathrm{A} \end{array} \] The average power absorbed by the circuit is W (rounded off to nearest integer).

The voltage applied and the current drawn by a circuit are\[\begin{array}{c}v(t)=95+200 \cos (120 \pi t)+90 \cos \left(360 \pi t-60^{\circ}\right) \mathrm{V} \\i(t)=4 \co...

asked Feb 16

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21

GATE IN 2024 | Question: 21
The current $i(t)$ drawn by a circuit is given as \[ i(t)=4+30 \cos (t)-20 \sin (t)+15 \cos (3 t)-10 \sin (3 t) \mathrm{A} \] The root-mean-square value of $i(t)$ is A (rounded off to one decimal place).

The current $i(t)$ drawn by a circuit is given as\[i(t)=4+30 \cos (t)-20 \sin (t)+15 \cos (3 t)-10 \sin (3 t) \mathrm{A}\]The root-mean-square value of $i(t)$ is A (round...

asked Feb 16

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22

GATE IN 2024 | Question: 22
A linear potentiometer $(0-10 \mathrm{k} \Omega)$ is used to measure the water level as shown in the figure. The resistance between $\mathrm{A}$ and $\mathrm{C}$ varies linearly from 0 to $10 \mathrm{k} \Omega$ for a change in water level from 0 to $20 \mathrm{~cm}$ ... $\mathrm{V}_{\text {out }}=5 \mathrm{~V}$, the water level is $\mathrm{cm}$ (rounded off to one decimal place).

A linear potentiometer $(0-10 \mathrm{k} \Omega)$ is used to measure the water level as shown in the figure. The resistance between $\mathrm{A}$ and $\mathrm{C}$ varies l...

asked Feb 16

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23

GATE IN 2024 | Question: 23
The switch in the following figure has been closed for a long time $(t

The switch in the following figure has been closed for a long time $(t

asked Feb 16

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24

GATE IN 2024 | Question: 24
Consider a system given by the following first order differential equation: \[ \frac{d y}{d t}=y+2 t-t^{2} \] where, $y(0)=1$ and $0 \leq t

Consider a system given by the following first order differential equation:\[\frac{d y}{d t}=y+2 t-t^{2}\]where, $y(0)=1$ and $0 \leq t

asked Feb 16

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25

GATE IN 2024 | Question: 25
Indian Premier League has divided the sixteen cricket teams into two equal pools: Pool-A and Pool-B. Four teams of Pool-A have blue logo jerseys while the rest four have red logo jerseys. Five teams of Pool-B have blue logo jerseys while the rest three have red logo jerseys. If one team from each pool reaches the final, the probability that one team has a blue logo jersey and another has a red logo jersey is (rounded off to one decimal place).

Indian Premier League has divided the sixteen cricket teams into two equal pools: Pool-A and Pool-B. Four teams of Pool-A have blue logo jerseys while the rest four have ...

asked Feb 16

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26

GATE IN 2024 | Question: 26
A wire of circular cross section with radius $a$ is shown in the figure. The current density is given by $\mathbf{J}=k s^{2}$, where $k$ is a constant, $s$ is the radial distance from the axis and $0 \leq s \leq a$. The total current $I$ in the wire is $\frac{\pi k a^{4}}{2}$ $\frac{2 \pi k a^{3}}{3}$ $\frac{\pi k a^{3}}{2}$ $\frac{\pi k a^{4}}{4}$

A wire of circular cross section with radius $a$ is shown in the figure. The current density is given by $\mathbf{J}=k s^{2}$, where $k$ is a constant, $s$ is the radial ...

asked Feb 16

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27

GATE IN 2024 | Question: 27
The measured values from a flow instrument, whose range is between 0 and 2 flow units, are shown in the histogram. The systematic error (bias) and the maximum error (in flow units), respectively are 0.12 and 0.14 0.01 and 0.10 0.10 and 0.14 0.04 and 0.12

The measured values from a flow instrument, whose range is between 0 and 2 flow units, are shown in the histogram. The systematic error (bias) and the maximum error (in f...

asked Feb 16

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28

GATE IN 2024 | Question: 28
Consider a discrete-time sequence \[ x[n]=\left\{\begin{array}{ll} (0.2)^{n}, & 0 \leq n \leq 7 \\ 0, & \text { otherwise } \end{array}\right. \] The region of convergence of $X(z)$, the $z$-transform of $x[n]$, consists of all values of $z$ except $z=0.2$ all values of $z$ all values of $z$ except $z=0$ all values of $z$ except $z=\infty$

Consider a discrete-time sequence\[x[n]=\left\{\begin{array}{ll}(0.2)^{n}, & 0 \leq n \leq 7 \\0, & \text { otherwise }\end{array}\right.\]The region of convergence of $X...

asked Feb 16

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29

GATE IN 2024 | Question: 29
In the bridge circuit shown in the figure, under balanced condition, the values of $R$ and $C$ respectively, are $1.010 \Omega$ and $19.802 \mu \mathrm{F}$ $9.901 \Omega$ and $0.505 \mu \mathrm{F}$ $19.802 \Omega$ and $1.01 \mu \mathrm{F}$ $39.604 \Omega$ and $2.02 \mu \mathrm{F}$

In the bridge circuit shown in the figure, under balanced condition, the values of $R$ and $C$ respectively, are$1.010 \Omega$ and $19.802 \mu \mathrm{F}$$9.901 \Omega$ a...

asked Feb 16

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30

GATE IN 2024 | Question: 30
Laplace transform of a signal $x(t)$ is \[ X(s)=\frac{1}{s^{2}+13 s+42} \] Let $u(t)$ be the unit step function. Choose the signal $x(t)$ from the following options if the region of convergence is $-7

Laplace transform of a signal $x(t)$ is\[X(s)=\frac{1}{s^{2}+13 s+42}\]Let $u(t)$ be the unit step function. Choose the signal $x(t)$ from the following options if the re...

asked Feb 16

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31

GATE IN 2024 | Question: 31
In the figure shown, both the opamps $\mathrm{A}_{1}$ and $\mathrm{A}_{2}$ are ideal, except that the opamp $\mathrm{A}_{1}$ has an offset voltage $\left(\mathrm{V}_{\text {os }}\right)$ of $1 \mathrm{mV}$. For $\mathrm{V}_{\text {in }}=0 \mathrm{~V}$, the values of the output voltages $V_{\text {out1 }}$ ... $-1 \mathrm{mV}$ $1 \mathrm{mV}$ and $0 \mathrm{mV}$ $1 \mathrm{mV}$ and $-1 \mathrm{mV}$ $2 \mathrm{mV}$ and $0 \mathrm{mV}$

In the figure shown, both the opamps $\mathrm{A}_{1}$ and $\mathrm{A}_{2}$ are ideal, except that the opamp $\mathrm{A}_{1}$ has an offset voltage $\left(\mathrm{V}_{\tex...

asked Feb 16

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32

GATE IN 2024 | Question: 32
In the figure shown, the positive edge triggered $\mathrm{D}$ flip-flops are initially reset to $Q=0$. The logic gates and the multiplexers have no propagation delay. After reset, a train of clock pulses (CLK) are applied. The logic-states of the inputs DIN, $\mathrm{S}$ and the clock pulses are also shown in the figure. Assuming no timing violations, the ... clock to the $5^{\text {th }}$ clock, $\mathrm{Y}_{3} \mathrm{Y}_{4} \mathrm{Y}_{5}$ is $001$ $010$ $000$ $011$

In the figure shown, the positive edge triggered $\mathrm{D}$ flip-flops are initially reset to $Q=0$. The logic gates and the multiplexers have no propagation delay. Aft...

asked Feb 16

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33

GATE IN 2024 | Question: 33
In the figure shown, $R=1 \mathrm{k} \Omega$ and $C=0.1 \mu \mathrm{F}$. For a dc gain of -10 , the $3 \mathrm{~dB}$ cut-off frequency (rounded off to one decimal place) is Assume the opamp is ideal. $159.1 \mathrm{~Hz}$ $1591.5 \mathrm{~Hz}$ $1750.7 \mathrm{~Hz}$ $175.0 \mathrm{~Hz}$

In the figure shown, $R=1 \mathrm{k} \Omega$ and $C=0.1 \mu \mathrm{F}$. For a dc gain of -10 , the $3 \mathrm{~dB}$ cut-off frequency (rounded off to one decimal place) ...

asked Feb 16

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34

GATE IN 2024 | Question: 34
Consider the feedback control system shown in the figure. The steady-state error $e_{s s}=\lim _{t \rightarrow \infty}(r(t)-y(t))$ due to unit step reference $r(t)$ is $\frac{K-1}{K}$ $\frac{1}{2}$ $0$ $\frac{1-K}{K}$

Consider the feedback control system shown in the figure. The steady-state error $e_{s s}=\lim _{t \rightarrow \infty}(r(t)-y(t))$ due to unit step reference $r(t)$ is$\f...

asked Feb 16

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35

GATE IN 2024 | Question: 35
The transfer function of a system is \[ G(s)=\frac{\omega_{n}^{2}}{s^{2}+2 \xi \omega_{n} s+\omega_{n}^{2}} \] Choose the range of $\xi$ and $\omega_{n}$ (in $\mathrm{rad} / \mathrm{s}$ ) from the following options such that the poles lie on the shaded region of the $s$-plane as shown in the figure. $\xi \geq \frac{1}{2}$ ... $\omega_{n} \geq 2$ $\xi \geq \frac{1}{2}$ and $\omega_{n} \geq \sqrt{3}$ $\xi \geq \frac{1}{4}$ and $\omega_{n} \geq \sqrt{3}$

The transfer function of a system is\[G(s)=\frac{\omega_{n}^{2}}{s^{2}+2 \xi \omega_{n} s+\omega_{n}^{2}}\]Choose the range of $\xi$ and $\omega_{n}$ (in $\mathrm{rad} / ...

asked Feb 16

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36

GATE IN 2024 | Question: 36
Let $C$ be the closed curve in the $x y$-plane, traversed in the counterclockwise direction along the boundary of the rectangle with vertices at $(0,0),(2,0),(2,1),(0,1)$. The value of the line integral \[ \oint_{C}\left(-e^{y} d x+e^{x} d y\right) \] is $e^{2}+2 e-3$ $e^{2}-2 e-3$ $e^{2}+e-1$ $e^{2}+e+1$

Let $C$ be the closed curve in the $x y$-plane, traversed in the counterclockwise direction along the boundary of the rectangle with vertices at $(0,0),(2,0),(2,1),(0,1)$...

asked Feb 16

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37

GATE IN 2024 | Question: 37
In the figure shown, assume - $\alpha$ is the phase angle between the load current and the load voltage - $\quad \beta$ is the phase angle by which pressure coil current lags the pressure coil voltage of the wattmeter - $\quad \gamma$ ... $\alpha=\gamma \pm \delta \pm \theta+\beta$ $\alpha=\gamma \pm \delta \pm \theta-\beta$

In the figure shown, assume- $\alpha$ is the phase angle between the load current and the load voltage- $\quad \beta$ is the phase angle by which pressure coil current la...

asked Feb 16

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38

GATE IN 2024 | Question: 38
Consider an ultrasonic measurement system shown in the figure. The ultrasonic transmitter $(T)$ sends a continuous wave signal $x(t)=\cos \left(2 \pi f_{1} t\right)$ volts towards an object whose vibration is modeled as $m(t)=0.5 \sin \left(2 \pi f_{2} t\right)$ volts. Neglecting the phase shift due to any other effect, the received signal at ... 25 and $\pm 250 \mathrm{~Hz}$ 0.5 and $\pm 500 \mathrm{~Hz}$ 1 and $\pm 1000 \mathrm{~Hz}$ 0.75 and $\pm 1000 \mathrm{~Hz}$

Consider an ultrasonic measurement system shown in the figure. The ultrasonic transmitter $(T)$ sends a continuous wave signal $x(t)=\cos \left(2 \pi f_{1} t\right)$ volt...

asked Feb 16

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39

GATE IN 2024 | Question: 39
The complex functions $f(z)=u(x, y)+i v(x, y)$ and $\overline{f(z)}=u(x, y)-i v(x, y)$ are both analytic in a given domain. Choose the correct option(s) from the following. $\frac{\partial u}{\partial x}=\frac{\partial v}{\partial y}=0$ $\frac{\partial u}{\partial y}=-\frac{\partial v}{\partial x} \neq 0$ $\frac{d f(z)}{d z}=0$ $\frac{d f(z)}{d z} \neq 0$

The complex functions $f(z)=u(x, y)+i v(x, y)$ and $\overline{f(z)}=u(x, y)-i v(x, y)$ are both analytic in a given domain. Choose the correct option(s) from the followin...

asked Feb 16

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40

GATE IN 2024 | Question: 40
The readings recorded from a 20 -psig pressure gauge are given in the Table. The regression line obtained for the data is $y=0.04 x+10.32$. The regression coefficient of determination, $R^{2}=$ (rounded off to three decimal places). \begin{tabular}{|c|c|c|c|c|c|} \hline$x$ & 1 & 2 & 3 & 4 & 5 \\ \hline$y$ (psig) & 10.3 & 10.5 & 10.4 & 10.5 & 10.5 \\ \hline \end{tabular}

The readings recorded from a 20 -psig pressure gauge are given in the Table. The regression line obtained for the data is $y=0.04 x+10.32$. The regression coefficient of ...

asked Feb 16