Hot questions in Electrical Circuits - GO Electrical

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GATE2013-26
A strain gauge forms one arm of the bridge shown in the figure below and has a nominal resistance without any load as $R_s$ = $300$ . Other bridge resistances are $R_1$ = $R_2$ = $R_3$ = $300$ . The maximum permissible current through the strain gauge is $20$ $mA$. During ... increased by $1$% over the nominal value, the output voltage $V_0$ in $mV$ is $56.02$ $40.83$ $29.85$ $10.02$

asked Feb 12, 2017 in Electrical Circuits by piyag476 (1.5k points)

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2

GATE2015-1-46
In a linear two-port network, when $10$ V is applied to Port $1$, a current of $4$ A flows through Port $2$ when it is short-circuited. When $5$ V is applied to Port $1$, a current of $1.25$ A flows through a $1 \Omega$ resistance connected across Port $2$. When $3$ V is applied to Port $1$, the current (in Ampere) through a $2 \Omega$ resistance connected across Port $2$ is ________.

asked Feb 12, 2017 in Electrical Circuits by makhdoom ghaya (9.2k points)

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3

GATE2014-1-20
In an oscilloscope screen, linear sweep is applied at the vertical axis horizontal axis origin both horizontal and vertical axis

asked Feb 12, 2017 in Electrical Circuits by makhdoom ghaya (9.2k points)

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4

GATE2014-3-8
The driving point impedance $Z(s)$ for the circuit shown below is $\frac{s^4+3s^2+1}{s^3+2s}$ $\frac{s^4+2s^2+1}{s^2+2}$ $\frac{s^2+1}{s^4+s^2+1}$ $\frac{s^3+1}{s^4+s^2+1}$

asked Feb 12, 2017 in Electrical Circuits by makhdoom ghaya (9.2k points)

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5

GATE2013-22
Three moving iron type voltmeters are connected as shown below. Voltmeter readings are $V$, $V1$ and $V2$ , as indicated. The correct relation among the voltmeter readings is $V=\frac{V1}{\sqrt{2}}+\frac{V2}{\sqrt{2}}$ V =$V_1$ +$V_2$ V =$V_1$V_2$ V =$V_2$ -$V_1$

asked Feb 12, 2017 in Electrical Circuits by piyag476 (1.5k points)

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6

GATE2013-27
In the circuit shown below, the knee current of the ideal Zener diode is $10$ $mA$. To maintain $5$ $V$ across $R_L$ minimum value of $R_L$ in $\Omega$ and the minimum power rating of the Zener diode in $mW$ respectively are $125$ and $125$ $125$ and $250$ $250$ and $125$ $250$ and $250$

asked Feb 12, 2017 in Electrical Circuits by piyag476 (1.5k points)

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7

GATE2014-2-48
Two ammeters $X$ and $Y$ have resistances of $1.2$ $Ω$ and $1.5$ $Ω$ respectively and they give full-scale deflection with $150$ $mA$ and $250$ $mA$ respectively. The ranges have been extended by connecting shunts so as to give full scale deflection ... placed in a circuit in which the total current flowing is $15$ $A$. The current in amperes indicated in ammeter $X$ is __________.

asked Feb 12, 2017 in Electrical Circuits by makhdoom ghaya (9.2k points)

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8

GATE2014-1-47
The reading of the voltmeter $(rms)$ in volts, for the circuit shown in the figure is __________

asked Feb 12, 2017 in Electrical Circuits by makhdoom ghaya (9.2k points)

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9

GATE2015-1-5
When the Wheatstone bridge shown in the figure is used to find the value of resistor $R_{X}$, the galvanometer $G$ indicates zero current when $R_{1}=50\Omega, R_{2}=65\Omega$ and $R_{3}=100\Omega$. If $R_{3}$ is known with $ 5$% tolerance on its nominal value of $100 \Omega$ , ... range of $R_{X}$ in Ohms? $[123.50, 136.50]$ $[125.89, 134.12]$ $[117.00, 143.00]$ $[120.25, 139.75]$

asked Feb 12, 2017 in Electrical Circuits by makhdoom ghaya (9.2k points)

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10

GATE2014-1-6
The three circuit elements shown in the figure are part of an electric circuit. The total power absorbed by the three circuit elements in watts is __________.

asked Feb 12, 2017 in Electrical Circuits by makhdoom ghaya (9.2k points)

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11

GATE2014-2-7
The switch SW shown in the circuit is kept at position $'1'$ for a long duration. At $t$ = $0+$, the switchis moved to position $'2'$. Assuming |$V_o2|$ > |$V_o1$|, the voltage $v_c$(t) across the capacitor is $V_c (t)=-V_{o2}(1-e^{-t/2RC})-V_{o1}$ ... $V_{o2}$+$V_{o1}$)$(1-e^{-t/2RC})-V_{o1}$ $V_c (t)=$($V_{o2}$+$V_{o1}$)$(1-e^{-t/2RC})+V_{o1}$

asked Feb 12, 2017 in Electrical Circuits by makhdoom ghaya (9.2k points)

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12

GATE2015-1-7
Of the four characteristics given below, which are the major requirements for an instrumentation amplifier? P. High common mode rejection ratio Q. High input impedance R. High linearity S. High output impedance P, Q and R only P and R only P, Q and S only Q, R and S only

asked Feb 12, 2017 in Electrical Circuits by makhdoom ghaya (9.2k points)

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13

GATE2013-7
A source $V_s$(t) =Vcos100$\pi$t has an internal impedence of ($4$+$j3$) $\Omega$.If a purely resistive load connected to this source has to extract the maximum power out of source,its value in $\Omega$ should be $3$ $4$ $5$ $7$

asked Feb 12, 2017 in Electrical Circuits by piyag476 (1.5k points)

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14

GATE2013-29
In the circuit shown below, if the source voltage $V_S$=100 $\angle$ $53.13^0$ V then the Thevenin’s equivalent voltage in Volts as seen by the load resistance $R_L$ is $100\angle 90^0$ $800\angle 0^0$ $800\angle 90^0$ $100\angle 60^0$

asked Feb 12, 2017 in Electrical Circuits by piyag476 (1.5k points)

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15

GATE2013-31
A voltage $1000sinw t$ $Volts$ is applied across $YZ$. Assuming ideal diodes, the voltage measured across $WX$ in $Volts$ is $sinw t$ $(sinw t + sinw t )$ / $2$ $(sinw t - sinw t )$ / $2$ $0$ for all $t$

asked Feb 12, 2017 in Electrical Circuits by piyag476 (1.5k points)

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16

GATE2014-3-30
The power delivered by the current source, in the figure, is ________.

asked Feb 12, 2017 in Electrical Circuits by makhdoom ghaya (9.2k points)

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17

GATE2014-3-47
A periodic waveform observed across a load is represented by $V(t)=\begin{cases} 1+sin\omega t & 0\leq \omega t< 6\pi \\ -1+sin\omega t & 6\pi \leq \omega t< 12\pi \end{cases}$ The measured value, using moving iron voltmeter connected across the load, is $\sqrt{\frac{3}{2}}$ $\sqrt{\frac{2}{3}}$ $\frac{3}{2}$ $\frac{2}{3}$

asked Feb 12, 2017 in Electrical Circuits by makhdoom ghaya (9.2k points)

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18

GATE2014-3-54
A diode circuit feeds an ideal inductor as shown in the figure. Given $v_s$=100 sin($w_t$) $V$ where $ω$ = $100\pi$ $rad/s$, and $L$ = $31.83$ $mH$. The initial value of inductor current is zero. Switch $S$ is closed at $t$ = $2.5$ $ms$. The peak value of inductor current $i_L$ (in $A$) in the first cycle is ________.

asked Feb 12, 2017 in Electrical Circuits by makhdoom ghaya (9.2k points)

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19

GATE2014-2-11
Assuming an ideal transformer, the Thevenin’s equivalent voltage and impedance as seen from the terminals $x$ and $y$ for the circuit in figure are $2$ $sin(wt)$ , $4Ω$ $1$ $sin(wt)$ , $1Ω$ $1$ $sin(wt)$ , $2Ω$ $1$ $sin(wt)$ , $0.5Ω$

asked Feb 12, 2017 in Electrical Circuits by makhdoom ghaya (9.2k points)

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20

GATE2014-2-19
The saw-tooth voltage waveform shown in the figure is fed to a moving iron voltmeter. Its reading would be close to _____________

asked Feb 12, 2017 in Electrical Circuits by makhdoom ghaya (9.2k points)

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