Hot questions in Electrical and Electronic Measurements / GO Electrical

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1

GATE Electrical 2014 Set 2 | Question: 52
In an $8085$ ... $A$ contains $60H$ $30H$ $06H$ $03H$

In an $8085$ microprocessor, the following program is executed$\begin{array}{rl}\textbf{Address} \\ \textbf{location} & \textbf{Instruction} \\ \text{2000H} & \text{XRA ...

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makhdoom ghaya asked Feb 11, 2017

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GATE Electrical 2014 Set 1 | Question: 23
The magnitude of the mid-band voltage gain of the circuit shown in figure is $($assuming $h_{fe}$ of the transistor to be $100)$ $1$ $10$ $20$ $100$

The magnitude of the mid-band voltage gain of the circuit shown in figure is $($assuming $h_{fe}$ of the transistor to be $100)$$1$$10$$20$$100$

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GATE Electrical 2013 | Question: 38
In the circuit shown below, $Q_1$ has negligible collector-to-emitter saturation voltage and the diode drops negligible voltage across it under forward bias. If $V_{cc}$ is +$5$ $V$, $X$ and $Y$ are digital signals with $0$ $V$ as logic $0$ and $V_{cc}$ as logic $1$, then the Boolean expression for $Z$ is $XY$ $\overline{X}Y$ $X\overline{Y}$ $\overline{XY}$

In the circuit shown below, $Q_1$ has negligible collector-to-emitter saturation voltage and the diode drops negligible voltage across it under forward bias. If $V_{cc}$ ...

piyag476

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piyag476 asked Feb 11, 2017

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4

GATE Electrical 2014 Set 1 | Question: 53
The figure shows the circuit diagram of a rectifier. The load consists of a resistance $10Ω$ and an inductance $0.05H$ connected in series. Assuming ideal thyristor and ideal diode, the thyristor firing angle (in degree) needed to obtain an average load voltage of $70V$ is ______

The figure shows the circuit diagram of a rectifier. The load consists of a resistance $10Ω$ and an inductance $0.05H$ connected in series. Assuming ideal thyristor and ...

makhdoom ghaya

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makhdoom ghaya asked Feb 11, 2017

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GATE Electrical 2014 Set 1 | Question: 50
Which of the following logic circuits is a realization of the function $F$ whose Karnaugh map is shown in figure:

Which of the following logic circuits is a realization of the function $F$ whose Karnaugh map is shown in figure:

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makhdoom ghaya asked Feb 11, 2017

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GATE Electrical 2014 Set 1 | Question: 22
In the Wien Bridge oscillator circuit shown in figure, the bridge is balanced when $\dfrac{R_3}{R_4}=\dfrac{R_1}{R_2}\, \: \: \omega =\dfrac{1}{\sqrt{R_1C_1R_2C_2}} \\$ ... $\dfrac{R_3}{R_4}+\dfrac{R_1}{R_2}=\dfrac{C_2}{C_1}, \: \: \omega =\dfrac{1}{R_1C_1R_2C_2}$

In the Wien Bridge oscillator circuit shown in figure, the bridge is balanced when$\dfrac{R_3}{R_4}=\dfrac{R_1}{R_2}\, \: \: \omega =\dfrac{1}{\sqrt{R_1C_1R_2C_2}} \\$ $\...

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makhdoom ghaya asked Feb 11, 2017

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7

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...

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makhdoom ghaya asked Feb 11, 2017

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8

GATE Electrical 2014 Set 1 | Question: 54
Figure $(i)$ shows the circuit diagram of a chopper. The switch $S$ in the circuit in figure $(i)$ is switched such that the voltage $v_D$ across the diode has the wave shape as shown in figure $(ii)$. The capacitance $C$ is large so that ... switch $S$ and the diode are ideal, the peak to peak ripple $(\text{in}\: A)$ in the inductor current is _________.

Figure $(i)$ shows the circuit diagram of a chopper. The switch $S$ in the circuit in figure $(i)$ is switched such that the voltage $v_D$ across the diode has the wave s...

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makhdoom ghaya asked Feb 11, 2017

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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...

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makhdoom ghaya asked Feb 11, 2017

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10

GATE Electrical 2014 Set 2 | Question: 54
A single-phase $SCR$ based $ac$ regulator is feeding power to a load consisting of $5 \Omega$ resistance and $16 \: mH$ inductance. The input supply is $230 \: V$, $50 \: Hz$ ac. The maximum firing angle at which the voltage across the device becomes zero all throughout and ... $30^\circ$ and $23 \: A$ $45^\circ$ and $23 \: A$ $45^\circ$ and $32 \: A$

A single-phase $SCR$ based $ac$ regulator is feeding power to a load consisting of $5 \Omega$ resistance and $16 \: mH$ inductance. The input supply is $230 \: V$, $50 \:...

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makhdoom ghaya asked Feb 11, 2017

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11

GATE Electrical 2014 Set 1 | Question: 25
Figure shows four electronic switches $(i), (ii), (iii)$ and $(iv)$. Which of the switches can block voltages of either polarity $($applied between terminals $a$ and $b)$ when the active device is in the $OFF$ state? $(i), (ii)$ and $(iii)$ $(ii), (iii)$ and $(iv)$ $(ii)$ and $(iii)$ $(i)$ and $(iv)$

Figure shows four electronic switches $(i), (ii), (iii)$ and $(iv)$. Which of the switches can block voltages of either polarity $($applied between terminals $a$ and $b)$...

makhdoom ghaya

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makhdoom ghaya asked Feb 11, 2017

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12

GATE Electrical 2013 | Question: 32
The separately excited $dc$ motor in the figure below has a rated armature current of $20A$ and a rated armature voltage of $150$ $V$. An ideal chopper switching at $5\:kHz$ is used to control the armature voltage. If $L_a$= $0.1$ $mH$, $R_a= 1\Omega$, ... obtain $50\%$ of the rated torque at the rated speed and the rated field current is $0.4$ $0.5$ $0.6$ $0.7$

The separately excited $dc$ motor in the figure below has a rated armature current of $20A$ and a rated armature voltage of $150$ $V$. An ideal chopper switching at $5\:k...

piyag476

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piyag476 asked Feb 11, 2017

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13

GATE Electrical 2016 Set 2 | Question: 20
A buck-boost $DC-DC$ converter, shown in the figure below, is used to convert $24 V$ battery voltage to $36 V DC$ voltage to feed a load of $72 W$. It is operated at $20 kHz$ with an inductor of $2 mH$ and output capacitor of $1000 \mu F$. All devices are considered to be ideal. The peak voltage across the solid-state switch $(S)$, in volt, is _______.

A buck-boost $DC-DC$ converter, shown in the figure below, is used to convert $24 V$ battery voltage to $36 V DC$ voltage to feed a load of $72 W$. It is operated at $20 ...

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makhdoom ghaya asked Jan 29, 2017

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14

GATE Electrical 2016 Set 2 | Question: 2
The circuit shown below is an example of a Low pass filter. Band pass filter. High pass filter. Notch filter.

The circuit shown below is an example of aLow pass filter.Band pass filter.High pass filter.Notch filter.

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makhdoom ghaya asked Jan 29, 2017

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15

GATE Electrical 2016 Set 1 | Question: 22
A buck converter, as shown in Figure (a) below, is working in steady state. The output voltage and the inductor current can be assumed to be ripple free. Figure (b) shows the inductor voltage $v_{L}$ during a complete switching interval. Assuming all devices are ideal, the duty cycle of the buck converter is ___________.

A buck converter, as shown in Figure (a) below, is working in steady state. The output voltage and the inductor current can be assumed to be ripple free. Figure (b) shows...

makhdoom ghaya

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makhdoom ghaya asked Jan 29, 2017

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16

GATE Electrical 2016 Set 2 | Question: 19
A three-phase diode bridge rectifier is feeding a constant $DC$ current of $100 A$ to a highly inductive load. If three-phase, $415 V, 50 Hz AC$ source is supplying to this bridge rectifier then the rms value of the current in each diode, in ampere, is ___________.

A three-phase diode bridge rectifier is feeding a constant $DC$ current of $100 A$ to a highly inductive load. If three-phase, $415 V, 50 Hz AC$ source is supplying to th...

makhdoom ghaya

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makhdoom ghaya asked Jan 29, 2017