Hot questions / GO Electrical

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921

GATE Electrical 2015 Set 2 | Question: 44
In the given network $V_{1}=100\angle 0^{\circ}V, V_{2}=100\angle -120^{\circ}V, V_{3}=100\angle +120^{\circ}V$. The phasor current $i$ (in Ampere) is $173.2\angle -60^{\circ}$ $173.2\angle 120^{\circ}$ $100.0\angle -60^{\circ}$ $100.0\angle 120^{\circ}$

In the given network $V_{1}=100\angle 0^{\circ}V, V_{2}=100\angle -120^{\circ}V, V_{3}=100\angle +120^{\circ}V$. The phasor current $i$ (in Ampere) is$173.2\angle -60^{\c...

makhdoom ghaya

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makhdoom ghaya asked Feb 11, 2017

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922

GATE Electrical 2015 Set 1 | Question: 6
A $(0-50 A)$ moving coil ammeter has a voltage drop of $0.1 V$ across its terminals at full scale deflection. The external shunt resistance (in milliohms) needed to extend its range to $(0 – 500 A)$ is _______.

A $(0-50 A)$ moving coil ammeter has a voltage drop of $0.1 V$ across its terminals at full scale deflection. The external shunt resistance (in milliohms) needed to exten...

makhdoom ghaya

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makhdoom ghaya asked Feb 11, 2017

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923

GATE Electrical 2013 | Question: 57
In the summer of $2012,$ in New Delhi, the mean temperature of Monday to Wednesday was $41^{\circ}C$ and of Tuesday to Thursday was $43^{\circ}C$. If the temperature on Thursday was $15\%$ higher than that of Monday, then the temperature in $^{\circ}C$ on Thursday was $40$ $43$ $46$ $49$

In the summer of $2012,$ in New Delhi, the mean temperature of Monday to Wednesday was $41^{\circ}C$ and of Tuesday to Thursday was $43^{\circ}C$. If the temperature on T...

piyag476

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piyag476 asked Feb 11, 2017

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924

GATE Electrical 2013 | Question: 23
Square roots of $-i$,where $i=\sqrt{-1}$, are $i,-i \\$ $\cos(-\dfrac{\pi }{4} )+i\sin(-\dfrac{\pi }{4})+\cos(\dfrac{3\pi }{4})+i\sin(\dfrac{3\pi }{4}) \\$ $\cos(\dfrac{\pi }{4} )+i\sin(\dfrac{3\pi }{4})+\cos(\dfrac{3\pi }{4})+i\sin(\dfrac{\pi }{4}) \\$ $\cos(\dfrac{3\pi }{4} )+i\sin(-\dfrac{3\pi }{4})+\cos(-\dfrac{3\pi }{4})+i\sin(\dfrac{3\pi }{4})$

Square roots of $-i$,where $i=\sqrt{-1}$, are$i,-i \\$$\cos(-\dfrac{\pi }{4} )+i\sin(-\dfrac{\pi }{4})+\cos(\dfrac{3\pi }{4})+i\sin(\dfrac{3\pi }{4}) \\$$\cos(\dfrac{\pi ...

piyag476

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piyag476 asked Feb 11, 2017

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925

GATE Electrical 2013 | Question: 54
The Voltage Source Inverter $(VSI)$ shown in the figure below is switched to provide a $50 Hz$, square-wave ac output voltage $(vo)$ across an $R-L$ load. Reference polarity of $vo$ and reference direction of the output current $i_o$ are indicated in the ... $Q1, Q2$ $Q3, Q4$ $D1, D2$ $D3, D4$

The Voltage Source Inverter $(VSI)$ shown in the figure below is switched to provide a $50 Hz$, square-wave ac output voltage $(vo)$ across an $R-L$ load. Reference polar...

piyag476

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piyag476 asked Feb 11, 2017

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926

GATE Electrical 2014 Set 3 | Question: 17
The signal flow graph of a system is shown below. $U(s)$ is the input and $C(s)$ is the output. Assuming, $h_1=b_1$ and $h_0=b_0-b_1a_1$ , the input-output transfer function, $G(s)=\dfrac{C(s)}{U(s)}$ ... $G(s)=\dfrac{b_1s+b_0}{s^2+a_1s+a_0} \\$ $G(s)=\dfrac{a_0s+a1}{s^2+b_0s+b_1}$

The signal flow graph of a system is shown below. $U(s)$ is the input and $C(s)$ is the output.Assuming, $h_1=b_1$ and $h_0=b_0-b_1a_1$ , the input-output transfer functi...

makhdoom ghaya

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makhdoom ghaya asked Feb 11, 2017

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927

GATE Electrical 2014 Set 3 | Question: 37
A non-salient pole synchronous generator having synchronous reactance of $0.8$ $pu$ is supplying $1$ $pu$ power to a unity power factor load at a terminal voltage of $1.1$ $pu$. Neglecting the armature resistance, the angle of the voltage behind the synchronous reactance with respect to the angle of the terminal voltage in degrees is ________.

A non-salient pole synchronous generator having synchronous reactance of $0.8$ $pu$ is supplying $1$ $pu$ power to a unity power factor load at a terminal voltage of $1.1...

makhdoom ghaya

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makhdoom ghaya asked Feb 11, 2017

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928

GATE Electrical 2014 Set 2 | Question: 53
A fully controlled converter bridge feeds a highly inductive load with ripple free load current. The input supply $(V_s)$ to the bridge is a sinusoidal source. Triggering angle of the bridge converter is $\alpha =30^ \circ$. The input power factor of the bridge is __________.

A fully controlled converter bridge feeds a highly inductive load with ripple free load current. The input supply $(V_s)$ to the bridge is a sinusoidal source. Triggering...

makhdoom ghaya

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makhdoom ghaya asked Feb 11, 2017

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929

GATE Electrical 2014 Set 2 | Question: 55
The SCR in the circuit shown has a latching current of $40 \: mA$. $A$ gate pulse of $50 \: \mu s$ is applied to the $SCR$. The maximum value of $R$ in $ \Omega$ to ensure successful firing of the $SCR$ is ________.

The SCR in the circuit shown has a latching current of $40 \: mA$. $A$ gate pulse of $50 \: \mu s$ is applied to the $SCR$. The maximum value of $R$ in $ \Omega$ to ensur...

makhdoom ghaya

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makhdoom ghaya asked Feb 11, 2017

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930

GATE Electrical 2014 Set 2 | Question: 33
A discrete system is represented by the difference equation $\begin{bmatrix} X_1(k+1)\\ X_2(k+2) \end{bmatrix}=\begin{bmatrix} a & a-1\\ a+1 & a \end{bmatrix}\begin{bmatrix} X_1(k)\\X_2(k) \end{bmatrix}$ It has initial conditions $X_1(0)$ = $1$ ... $a$ = $1$, are $1\pm j0$ $-1\pm j0$ $\pm 1+j0$ $0\pm j1$

A discrete system is represented by the difference equation$\begin{bmatrix} X_1(k+1)\\ X_2(k+2) \end{bmatrix}=\begin{bmatrix} a & a-1\\ a+1 & a \end{bmatrix}\begin{bmatri...

makhdoom ghaya

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makhdoom ghaya asked Feb 11, 2017

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931

GATE Electrical 2015 Set 2 | Question: 3
Match the following. ... $P-4; Q-1; R-3; S-2$ $P-4; Q-3; R-1; S-2$ $P-3; Q-4; R-2; S-1$

Match the following.$\begin{array}{|l|l|l|l|} \hline P. & \text{Stokes’s Theorem} & 1. & ∯ D.ds = Q \\ \hline Q. & \text{Gauss’s Theorem} & 2. & \oint f(z) dz =0 \\...

makhdoom ghaya

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makhdoom ghaya asked Feb 11, 2017

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932

GATE Electrical 2015 Set 2 | Question: 20
Find the transformer ratios $a$ and $b$ such that the impedance ($Z_{in}$) is resistive and equals $2.5 \Omega$ when the network is excited with a sine wave voltage of angular frequency of $5000$ rad/s. $a = 0.5, b = 2.0$ $a = 2.0, b = 0.5$ $a = 1.0, b = 1.0$ $a = 4.0, b = 0.5$

Find the transformer ratios $a$ and $b$ such that the impedance ($Z_{in}$) is resistive and equals $2.5 \Omega$ when the network is excited with a sine wave voltage of an...

makhdoom ghaya

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makhdoom ghaya asked Feb 11, 2017

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933

GATE Electrical 2015 Set 2 | GA Question: 6
Out of the following four sentences, select the most suitable sentence with respect to grammar and usage: Since the report lacked needed information, it was of no use to them. The report was useless to them because there were no needed ... it was not real useful to them. Since the report lacked needed information, it would not had been useful to them

Out of the following four sentences, select the most suitable sentence with respect to grammar and usage:Since the report lacked needed information, it was of no use to t...

makhdoom ghaya

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makhdoom ghaya asked Feb 11, 2017

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934

GATE Electrical 2015 Set 1 | Question: 21
A separately excited $DC$ generator has an armature resistance of $0.1 \Omega$ and negligible armature inductance. At rated field current and rated rotor speed, its open-circuit voltage is $200 V$. When this generator is operated at half the rated speed, with ... capacitor is connected will the voltage across it reach $25 V$? $62.25$ $69.3$ $73.25$ $77.3$

A separately excited $DC$ generator has an armature resistance of $0.1 \Omega$ and negligible armature inductance. At rated field current and rated rotor speed, its open-...

makhdoom ghaya

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makhdoom ghaya asked Feb 11, 2017

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935

GATE Electrical 2014 Set 3 | Question: 52
A hysteresis type $TTL$ inverter is used to realize an oscillator in the circuit shown in the figure. If the lower and upper trigger level voltages are $0.9$ $V$ and $1.7$ $V$, the period (in $ms$), for which output is $LOW$, is __________.

A hysteresis type $TTL$ inverter is used to realize an oscillator in the circuit shown in the figure.If the lower and upper trigger level voltages are $0.9$ $V$ and $1.7$...

makhdoom ghaya

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makhdoom ghaya asked Feb 11, 2017

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936

GATE Electrical 2014 Set 2 | Question: 20
While measuring power of a three-phase balanced load by the two-wattmeter method, the readings are $100$ $W$ and $250$ $W$. The power factor of the load is ______.

While measuring power of a three-phase balanced load by the two-wattmeter method, the readings are $100$ $W$ and $250$ $W$. The power factor of the load is ______.

makhdoom ghaya

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makhdoom ghaya asked Feb 11, 2017

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937

GATE Electrical 2014 Set 2 | Question: 22
The transistor in the given circuit should always be in active region. Take $V_{CE(sat)}$ = $0.2$ $V$ , $V_{BE}$=$0.7$ $V$. The maximum value of $R_c$ in $Ω$ which can be used, is ______________.

The transistor in the given circuit should always be in active region. Take $V_{CE(sat)}$ = $0.2$ $V$ , $V_{BE}$=$0.7$ $V$. The maximum value of $R_c$ in $Ω$ which can b...

makhdoom ghaya

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makhdoom ghaya asked Feb 11, 2017

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938

GATE Electrical 2014 Set 1 | Question: 3
The solution for the differential equation $\dfrac{d^2x}{dt^2}=-9x,$ with initial conditions $x(0)=1$ and $\dfrac{dx}{dt}\bigg \vert_{t=0}=1$ , is $t^2+t+1 \\$ $\sin 3t+\dfrac{1}{3}\cos3t+\dfrac{2}{3} \\$ $\dfrac{1}{3}\sin3t+\cos 3t \\$ $\cos 3t+t$

The solution for the differential equation $\dfrac{d^2x}{dt^2}=-9x,$ with initial conditions $x(0)=1$ and $\dfrac{dx}{dt}\bigg \vert_{t=0}=1$ , is$t^2+t+1 \\$$\sin 3t+\df...

makhdoom ghaya

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makhdoom ghaya asked Feb 11, 2017

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939

GATE Electrical 2015 Set 1 | GA Question: 7
The given statement is followed by some courses of action. Assuming the statement to be true, decide the correct option. Statement: There has been a significant drop in the water level in the lakes supplying water to the city. Course of action: The ... and $II$ follow. Statement $I$ and $III$ follow. Statement $II$ and $III$ follow. All statements follow.

The given statement is followed by some courses of action. Assuming the statement to be true, decide the correct option.Statement:There has been a significant drop in the...

makhdoom ghaya

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makhdoom ghaya asked Feb 11, 2017

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940

GATE Electrical 2013 | Question: 14
The input impedance of the permanent magnet moving coil $(PMMC)$ voltmeter is infinite. Assuming that the diode shown in the figure below is ideal, the reading of the voltmeter in Volts is $4.46$ $3.15$ $2.23$ $0$

The input impedance of the permanent magnet moving coil $(PMMC)$ voltmeter is infinite. Assuming that the diode shown in the figure below is ideal, the reading of the vol...

piyag476

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piyag476 asked Feb 11, 2017