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Hot questions in Electric Circuits
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21
GATE Electrical 2014 Set 2 | Question: 19
The saw-tooth voltage waveform shown in the figure is fed to a moving iron voltmeter. Its reading would be close to _____________
The saw-tooth voltage waveform shown in the figure is fed to a moving iron voltmeter. Its reading would be close to _____________
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makhdoom ghaya
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Feb 11, 2017
Electric Circuits
gate2014-ee-2
waveforms
voltmeter
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22
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? $\sqrt{(1+x)}$ $(1+x)$ $1/\sqrt{(1+x)}$ $\sqrt{(1-x)}$
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)}$$\sqrt{(1-...
makhdoom ghaya
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makhdoom ghaya
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Feb 11, 2017
Electric Circuits
gate2015-ee-1
wheatstone-bridge
voltage-divider
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23
GATE Electrical 2013 | Question: 1
In the circuit shown below what is the output voltage $(V_{out})$ in $Volts$ if a silicon transistor $Q$ and an ideal op-amp are used? $-15$ $-0.7$ $0.7$ $15$
In the circuit shown below what is the output voltage $(V_{out})$ in $Volts$ if a silicon transistor $Q$ and an ideal op-amp are used?$-15$$-0.7$$0.7$$15$
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Electric Circuits
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operational-amplifier
transistor
ground
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24
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 ___________.
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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Electric Circuits
gate2014-ee-2
power-loss
reactance
numerical-answers
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25
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 $3$ $4$ $5$ $7$
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 ...
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Electric Circuits
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nodal-analysis
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26
GATE Electrical 2015 Set 2 | Question: 19
The current $i$ (in Ampere) in the $2 \Omega$ resistor of the given network is ________.
The current $i$ (in Ampere) in the $2 \Omega$ resistor of the given network is ________.
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Electric Circuits
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27
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 full-scale 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 __________.
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 r...
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makhdoom ghaya
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Electric Circuits
gate2014-ee-2
current-measurement
voltage-measurement
numerical-answers
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28
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 $ $1 \sin(wt), 1\Omega$ $1 \sin(wt), 2\Omega$ $1 \sin(wt), 0.5\Omega$
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 \Omeg...
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Electric Circuits
gate2014-ee-2
thevinin-circuit
ideal-transformer
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29
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 $100\angle 90^{\circ}$ $800\angle 0^{\circ}$ $800\angle 90^{\circ}$ $100\angle 60^{\circ}$
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 $...
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Electric Circuits
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30
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 $80$
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...
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Electric Circuits
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equivalent-circuit
parallel-combination
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31
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 $\dfrac{V}{L} \\$ $\dfrac{-V}{R} \\$ $0 \\$ $\dfrac{-RV}{L^{2}}$
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^{+...
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Electric Circuits
gate2015-ee-2
switching
rl-circuit
zero-initial-condition
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0
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32
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...
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Electric Circuits
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current-measurement
ammeter
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33
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?
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 sourc...
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Electric Circuits
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capacitance
switch
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34
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 _______
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\tim...
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Electric Circuits
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incandescent
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filament
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35
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 _______.
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 i...
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Electric Circuits
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time-period
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36
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 ________
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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Electric Circuits
gate2014-ee-1
loop-analysis
dc-supply
numerical-answers
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37
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 $6.40$
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...
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Electric Circuits
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sinusoidal-voltage-source
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38
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 ________.
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...
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Electric Circuits
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series-connection
steady
state
numerical-answers
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39
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
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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voltage-storing-elements
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40
GATE Electrical 2015 Set 1 | Question: 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 $ \pm 5 \%$ tolerance on its nominal ... $R_{X}$ in Ohms? $[123.50, 136.50]$ $[125.89, 134.12]$ $[117.00, 143.00]$ $[120.25, 139.75]$
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\O...
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Electric Circuits
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