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Recent questions and answers in Electric Circuits
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GATE Electrical 2014 Set 3  Question: 30
The power delivered by the current source, in the figure, is ________.
answered
Mar 17
in
Electric Circuits
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shreekant98
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280
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gate2014ee3
currentsource
negativepower
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GATE Electrical 2013  Question: 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 ... $V_0$ in $mV$ is $56.02$ $40.83$ $29.85$ $10.02$
answered
Aug 27, 2018
in
Electric Circuits
by
Aslamshaik
(
140
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gate2013ee
bridgecircuit
variableresistor
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3
GATE Electrical 2013  Question: 30
Three capacitors $C_1, C_2$, and $C_3$, whose values are $10\mu F, 5\mu F$, and $2\mu F$ respectively, have breakdown voltages of $10V$, $5V$, and $12V$ respectively. For the interconnection shown, the maximum safe voltage in Volts that can be applied ... capacitance across the terminals are respectively $2.8$and $36$ $7$ and $19$ $2.8$ and $32$ $7$ and $80$
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Feb 12, 2017
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Electric Circuits
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gate2013ee
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4
GATE Electrical 2013  Question: 31
A voltage $1000 \sin \omega t$ Volts is applied across $YZ$. Assuming ideal diodes, the voltage measured across $WX$ in Volts is $\sin \omega t$ $(\sin \omega t + \sin \omega t ) / 2$ $(\sin \omega t  \sin \omega t ) / 2$ $0$ for all $t$
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Feb 12, 2017
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gate2013ee
closedloop
diode
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5
GATE Electrical 2013  Question: 29
In the circuit shown below, if the source voltage $V_S=100 \: \angle$ $53.13^{\circ}$ V then the Thevenin’s equivalent voltage in Volts as seen by the load resistance $R_L$ is $100\angle 90^{\circ}$ $800\angle 0^{\circ}$ $800\angle 90^{\circ}$ $100\angle 60^{\circ}$
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Feb 12, 2017
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Electric Circuits
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piyag476
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gate2013ee
thevinincircuit
meshanalysis
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6
GATE Electrical 2013  Question: 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 $250$
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Feb 12, 2017
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Electric Circuits
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gate2013ee
reversesaturationcurrent
nodalanalysis
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7
GATE Electrical 2013  Question: 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 $V=\dfrac{V1}{\sqrt{2}}+\dfrac{V2}{\sqrt{2}}$ $V =V_1 +V_2$ $V =V_1V_2$ $V =V_2  V_1$
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Feb 12, 2017
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Electric Circuits
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piyag476
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1.5k
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gate2013ee
voltagesource
lcfilter
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8
GATE Electrical 2013  Question: 7
A source $V_s(t) =V\cos100\pi t$ has an internal impedance 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 $3$ $4$ $5$ $7$
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Feb 12, 2017
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Electric Circuits
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piyag476
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gate2013ee
nodalanalysis
meshanalysis
0
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9
GATE Electrical 2013  Question: 1
In the circuit shown below what is the output voltage $(V_{out})$ in $Volts$ if a silicon transistor $Q$ and an ideal opamp are used? $15$ $0.7$ $0.7$ $15$
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Feb 12, 2017
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Electric Circuits
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piyag476
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1.5k
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gate2013ee
operationalamplifier
transistor
ground
0
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0
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10
GATE Electrical 2014 Set 3  Question: 54
A diode circuit feeds an ideal inductor as shown in the figure. Given $v_s=100 \sin(w_t) \: V$ where $\omega = 100\pi \text{ rad/s}$, 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 ________.
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Feb 12, 2017
in
Electric Circuits
by
makhdoom ghaya
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9.3k
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gate2014ee3
timeresponse
peakvalue
numericalanswers
0
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0
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11
GATE Electrical 2014 Set 3  Question: 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 $\sqrt{\dfrac{3}{2}} \\$ $\sqrt{\dfrac{2}{3}} \\$ $\dfrac{3}{2} \\$ $\dfrac{2}{3}$
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Feb 12, 2017
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Electric Circuits
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makhdoom ghaya
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gate2014ee3
waveforms
periodicfunctions
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12
GATE Electrical 2014 Set 3  Question: 29
The Norton’s equivalent source in amperes as seen into the terminals $X$ and $Y$ is _______.
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Feb 12, 2017
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gate2014ee3
thevenins
theorem
nortonstheorem
numericalanswers
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13
GATE Electrical 2014 Set 3  Question: 8
The driving point impedance $Z(s)$ for the circuit shown below is $\dfrac{s^4+3s^2+1}{s^3+2s} \\ $ $\dfrac{s^4+2s^2+1}{s^2+2} \\ $ $\dfrac{s^2+1}{s^4+s^2+1} \\$ $\dfrac{s^3+1}{s^4+s^2+1}$
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Feb 12, 2017
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Electric Circuits
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makhdoom ghaya
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9.3k
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gate2014ee3
passiveloads
driving
point
impedance
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14
GATE Electrical 2014 Set 2  Question: 48
Two ammeters $X$ and $Y$ have resistances of $1.2$ $Ω$ and $1.5$ $Ω$ respectively and they give fullscale deflection with $150$ $mA$ and $250$ $mA$ respectively. The ranges have been extended by connecting shunts so as to give ... in a circuit in which the total current flowing is $15$ $A$. The current in amperes indicated in ammeter $X$ is __________.
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Feb 12, 2017
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Electric Circuits
by
makhdoom ghaya
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9.3k
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gate2014ee2
currentmeasurement
voltagemeasurement
numericalanswers
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0
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15
GATE Electrical 2014 Set 2  Question: 31
The total power dissipated in the circuit, shown in the figure, is $1$ $kW$. The voltmeter, across the load, reads $200$ $V$. The value of $X_L$ is ___________.
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Feb 12, 2017
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Electric Circuits
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makhdoom ghaya
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gate2014ee2
powerloss
reactance
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16
GATE Electrical 2014 Set 2  Question: 30
The voltage across the capacitor, as shown in the figure, is expressed as $V_c(t)=A_1\sin(\omega _1t\theta _1)+A_2 \sin(\omega _2t\theta _2)$ The values of $A_1 $and $A_2$ respectively, are $2.0$ and $1.98$ $2.0$ and $4.20$ $2.5$ and $3.50$ $5.0$ and $6.40$
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Feb 12, 2017
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Electric Circuits
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sinusoidalvoltagesource
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17
GATE Electrical 2014 Set 2  Question: 19
The sawtooth voltage waveform shown in the figure is fed to a moving iron voltmeter. Its reading would be close to _____________
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Feb 12, 2017
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Electric Circuits
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makhdoom ghaya
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9.3k
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gate2014ee2
waveforms
voltmeter
numericalanswers
0
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0
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18
GATE Electrical 2014 Set 2  Question: 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) , 4 \Omega $ $1 \sin(wt), 1\Omega$ $1 \sin(wt), 2\Omega$ $1 \sin(wt), 0.5\Omega$
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Feb 12, 2017
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Electric Circuits
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makhdoom ghaya
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9.3k
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gate2014ee2
thevinincircuit
idealtransformer
0
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0
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19
GATE Electrical 2014 Set 2  Question: 7
The switch SW shown in the circuit is kept at position $'1'$ for a long duration. At $t = 0+$, the switch is moved to position $'2'$. Assuming $\mid V_o2\mid > \mid V_o1\mid$, the voltage $v_c$(t) across the capacitor is $V_c (t)=V_{o2}(1e^{t/2RC})V_{o1}$ ... $V_{o1}$)$(1e^{t/2RC})V_{o1}$ $V_c (t)=$($V_{o2}$+$V_{o1}$)$(1e^{t/2RC})+V_{o1}$
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Feb 12, 2017
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switchingschemes
loads
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0
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20
GATE Electrical 2014 Set 1  Question: 47
The reading of the voltmeter $(rms)$ in volts, for the circuit shown in the figure is __________
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Feb 12, 2017
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makhdoom ghaya
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gate2014ee1
nodalanalysis
voltmeter
numericalanswers
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0
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21
GATE Electrical 2014 Set 1  Question: 29
An incandescent lamp is marked $40\:W, 240\: V$. If resistance at room temperature $(26^{\circ}C)$ is $120\:\Omega$, and temperature coefficient of resistance is $4.5\times 10^{3} / ^{\circ}C$, then its $ON$ state filament temperature in $^{\circ}C$ is approximately _______
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Feb 12, 2017
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Electric Circuits
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gate2014ee1
incandescent
lamp
filament
numericalanswers
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0
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22
GATE Electrical 2014 Set 1  Question: 20
In an oscilloscope screen, linear sweep is applied at the vertical axis horizontal axis origin both horizontal and vertical axis
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Feb 12, 2017
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Electric Circuits
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gate2014ee1
oscilloscope
linear
sweep
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0
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23
GATE Electrical 2014 Set 1  Question: 30
In the figure, the value of resistor $R$ is $(25 + I/2)\: \text{ohms},$ where $I$ is the current in amperes. The current $I$ is ________
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Feb 12, 2017
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Electric Circuits
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makhdoom ghaya
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gate2014ee1
loopanalysis
dcsupply
numericalanswers
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0
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24
GATE Electrical 2014 Set 1  Question: 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 __________.
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Feb 12, 2017
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Electric Circuits
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makhdoom ghaya
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9.3k
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gate2014ee1
nodalanalysis
dcsupply
kcl
numericalanswers
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0
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25
GATE Electrical 2014 Set 1  Question: 8
A combination of $1\:\mu F$ capacitor with an initial voltage $V_{c}(0)=2\:V$ in series with a $100\:\Omega$ resistor is connected to a $20\:mA$ ideal $dc$ current source by operating both switches at $t=0s$ as shown. Which of the following graphs shown in the options approximates the voltage $V_s$ across the current source over the next few seconds?
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Feb 12, 2017
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Electric Circuits
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makhdoom ghaya
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gate2014ee1
capacitance
switch
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26
GATE Electrical 2015 Set 2  Question: 30
The coils of a wattmeter have resistances $0.01 \Omega$ and $1000 \Omega$; their inductances may be neglected. The wattmeter is connected as shown in the figure, to measure the power consumed by a load, which draws $25 A$ at power factor $0.8$. The voltage across the load terminals is $30 V$. The percentage error on the wattmeter reading is ________.
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Feb 12, 2017
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Electric Circuits
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makhdoom ghaya
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gate2015ee2
powermeasurement
coils
powerfactor
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0
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27
GATE Electrical 2015 Set 2  Question: 18
A series $RL$ circuit is excited at $t = 0$ by closing a switch as shown in the figure. Assuming zero initial conditions, the value of $\dfrac{d^{2}i}{dt^{2}}$ at $t=0^{+}$ is $\dfrac{V}{L} \\$ $\dfrac{V}{R} \\$ $0 \\$ $\dfrac{RV}{L^{2}}$
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switching
rlcircuit
zeroinitialcondition
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28
GATE Electrical 2015 Set 2  Question: 19
The current $i$ (in Ampere) in the $2 \Omega$ resistor of the given network is ________.
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Feb 12, 2017
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Electric Circuits
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makhdoom ghaya
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electriccircuitreduction
nodalanalysis
numericalanswers
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29
GATE Electrical 2015 Set 2  Question: 7
A capacitive voltage divider is used to measure the bus voltage $V_{\text{bus}}$ in a highvoltage $50$ Hz AC system as shown in the figure. The measurement capacitors $C_{1}$ and $C_{2}$ have tolerances of $\pm 10\%$ on their nominal ... $V_{\text{out}}$ (in $kV$), considering the capacitor tolerances, is _______.
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Feb 12, 2017
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gate2015ee2
capacitivevoltagedivider
tolerance
numericalanswers
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30
GATE Electrical 2015 Set 1  Question: 50
A $200/400$ V, $50$ Hz, twowinding transformer is rated at $20$ kVA. Its windings are connected as an autotransformer of rating $200/600$ V. A resistive load of $12 \Omega$ is connected to the high voltage ($600$ V) side of the autotransformer. The value of equivalent load resistance (in Ohm) as seen from low voltage side is _________.
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Feb 12, 2017
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Electric Circuits
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electricalcircuits
twowinding
transformer
autotransformer
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0
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31
GATE Electrical 2015 Set 1  Question: 47
In the given circuit, the parameter $k$ is positive, and the power dissipated in the $2 \Omega$ resistor is $12.5$W. The value of $k$ is _________.
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Feb 12, 2017
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Electric Circuits
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32
GATE Electrical 2015 Set 1  Question: 46
In a linear twoport network, when $10$ V is applied to Port $1$, a current of $4$ A flows through Port $2$ when it is shortcircuited. When $5$ V is applied to Port $1$, a current of $1.25$ A flows through a $1 \Omega$ ... When $3$ V is applied to Port $1$, the current (in Ampere) through a $2 \Omega$ resistance connected across Port $2$ is ________.
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33
GATE Electrical 2015 Set 1  Question: 45
The circuit shown in the figure has two sources connected in series. The instantaneous voltage of the $AC$ source (in Volt) is given by $v(t) = 12 \sin t$. If the circuit is in steady state, then the rms value of the current (in Ampere) flowing in the circuit is ________.
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Electric Circuits
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steady
state
numericalanswers
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0
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34
GATE Electrical 2015 Set 1  Question: 31
The circuit shown is meant to supply a resistive load $R_{L}$ from two separate $DC$ voltage sources. The switches $S1$ and $S2$ are controlled so that only one of them is $ON$ at any instant. $S1$ is turned on for $0.2 ms$ ... inductor current and negligible ripple on the capacitor voltage, the output voltage $V_{0}$ (in Volt) across $R_{L}$ is _______.
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Electric Circuits
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ripplevoltages
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numericalanswers
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35
GATE Electrical 2015 Set 1  Question: 30
An unbalanced $DC$ Wheatstone bridge is shown in the figure. At what value of $P$ will the magnitude of $V_{0}$ be maximum? $\sqrt{(1+x)}$ $(1+x)$ $1/\sqrt{(1+x)}$ $\sqrt{(1x)}$
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Electric Circuits
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wheatstonebridge
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36
GATE Electrical 2015 Set 1  Question: 20
An inductor is connected in parallel with a capacitor as shown in the figure. As the frequency of current $i$ is increased, the impedance $(Z)$ of the network varies as
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Electric Circuits
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currentstoringelements
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37
GATE Electrical 2015 Set 1  Question: 19
For the given circuit, the Thevenin equivalent is to be determined. The Thevenin voltage, $V_{Th}$ (in Volt), seen from terminal $AB$ is __________.
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38
GATE Electrical 2015 Set 1  Question: 18
The voltages developed across the $3 \Omega$ and $2 \Omega$ resistors shown in the figure are $6 V$ and $2 V$ respectively, with the polarity as marked. What is the power (in Watt) delivered by the $5 V$ voltage source? $5$ $7$ $10$ $14$
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Electric Circuits
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voltagesource
polarity
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39
GATE Electrical 2015 Set 1  Question: 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
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amplifier
bjts
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40
GATE Electrical 2015 Set 1  Question: 6
A $(050 A)$ 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 _______.
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Electric Circuits
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gate2015ee1
currentmeasurement
ammeter
numericalanswers
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