Express the input voltages v_{1} and v_{2} in terms of differential input (v_{d}) and common-mode input(v_{c}). Given v_{2} > v_{2}.

- a)V
_{d}= V_{1}– V_{2}, V_{c}= 0.5(V_{1}+ V_{2}) - b)V
_{d}= V_{2}– V_{1}, V_{c}= V_{1}+ V_{2} - c)V
_{d}= V_{1}– V_{2}, V_{c}= V_{1}+ V_{2} - d)V
_{d}= V_{2}– V_{1}, V_{c}= 0.5(V_{1}+ V_{2})

Correct answer is option 'D'. Can you explain this answer?

Sai Charan answered • 42 minutes ago

This is the correct mathematical representation.

The number of-branches and nodes in the graph are respectively

- a)6,10
- b)10, 5
- c)10, 10
- d)5, 10

Correct answer is option 'B'. Can you explain this answer?

SANJU KUMARI answered • 42 minutes ago

n - 5 and b = 10

In a transmission line terminated by characteristic impedance, Z_{0}

- a)the incident current is zero for only applied voltage.
- b)there are large number of maximum and minimum on the line.
- c)the reflection is maximum due to termination.
- d)there is no reflection of the incident wave.

Correct answer is option 'D'. Can you explain this answer?

KIRAN DEVI answered • 42 minutes ago

When a transmission line is terminated by an impedance Z, then reflection coefficient are:

Here, Z_{0} = Characteristic impedance of transmission line.

Since Z = Z_{0} therefore reflection co-efficient of voltage (p_{v}) and current (p_{I}) both will be zero, i.e there will be no reflection of incident wave.

Here, Z

Since Z = Z

In an SCR half wave rectifier, the forward breakdown voltage of SCR is 110 V for a gate current of 1 mA. If a 50 Hz sinusoidal voltage of 220 V peak is applied, the time during which SCR remains OFF would be equal to (assume load resistance is 100 Ω and the holding current to be zero)

- a)1.67 ms
- b)2.25 ms
- c)1.88 ms
- d)2.66 ms

Correct answer is option 'A'. Can you explain this answer?

HEEMA RAJENDER answered • 42 minutes ago

The discrete timefourier transform for the given signal x[n] - u[n] is

- a)
- b)
- c)
- d)

Correct answer is option 'C'. Can you explain this answer?

PAMITA JEET answered • 42 minutes ago

where A is constant

The Fourier transform of odd real sequences must be purely imagenary, thus A = π

The 7-bit even parity Hamming code of the binary bits 0101 is

- a)0 0 1 0 1 0 0
- b)0 1 0 0 1 0 1
- c)1 0 1 0 0 1 0
- d)1 1 0 1 1 0 1

Correct answer is option 'B'. Can you explain this answer?

MENKA PARASHAR answered • 42 minutes ago

Given,

∴ The required 7-bit even parity Hamming code is ( 0 1 0 0 1 0 1).

The current distribution factors for the power system network shown below are given by

- a)
- b)
- c)
- d)

Correct answer is option 'C'. Can you explain this answer?

JYOTI CHARAN answered • 42 minutes ago

Since the load is at plant 2 therefore,

Na_{2} = 0 and Na_{1} = 1

Na

The complement form of is

- a)A + BC
- b)
- c)
- d)

Correct answer is option 'B'. Can you explain this answer?

BHARTI THAKUR answered • 42 minutes ago

Given

∴

Directions:

Q. No. 6 – 10 Carry Two Marks Each

Q.

An air pressure contour line joins locations in a region having the same atmospheric pressure. The following is an air pressure contour plot of a geographical region. Contour lines are shown at 0.05 bar intervals in this plot

.

If the possibility of a thunderstorm is given by how fast air pressure rises or drops over a region, which of the following regions is most likely to have a thunderstorm?

- a)P
- b)Q
- c)R
- d)S

Correct answer is option 'C'. Can you explain this answer?

RITIKA JAWAHAR answered • 42 minutes ago

In general thunder storms are occurred in a region where suddenly air pressure changes (i.e.,) should rise (or) sudden fall of air pressure. From the given contour map in "R‟ region only more changes in air pressure. So, the possibility of a thunder storms in this region.

So option (C) is correct.

So option (C) is correct.

For a TEM wave to propagate in a medium, the medium has to be

- a)Air
- b)Insulator
- c)Dispersive
- d)Non dispersive

Correct answer is option 'D'. Can you explain this answer?

REENA VERMA answered • 42 minutes ago

Answer: d

Explanation: The medium in which the TEM waves propagate has to be non- dispersive. This implies the phase velocity and the characteristic impedance has to be constant over a wide band.

Explanation: The medium in which the TEM waves propagate has to be non- dispersive. This implies the phase velocity and the characteristic impedance has to be constant over a wide band.

Consider the line integral where z = x + iy. The line C is shown in the figure below.

Rajbala answered • 43 minutes ago

curve " C " is y = x ⇒ dy = dx

The open-loop transfer function of a unity negative feedback system is

The polar plot of the system will be

Nirmal Dhiman answered • 43 minutes ago

The polar plot intersects with the negative real axis as in making imaginary term of G(j_{ω}) to be zero, the solution exists.

The forward resistance for a PIN diode is given by ________

- a)R
_{F}= W/σP - b)R
_{F}= W/σN - c)R
_{F}= WσP - d)R
_{F}= WσN

Correct answer is option 'B'. Can you explain this answer?

Meghna Kataria answered • 11 hours ago

Forward resistance for a PIN diode depends on the width, current density and positive carrier concentration of the diode. No diode is perfectly ideal. In practise, a diode offers a small resistance in forward bias which is called as forward resistance.

What is the other representation of the given PNP transistor connected in common emitter configuration?

- a)
- b)
- c)
- d)

Correct answer is option 'D'. Can you explain this answer?

Esakshi answered • 11 hours ago

The emitter junction is forward biased with the help of battery V_{EE} by which, negative of the battery is connected to the emitter while positive is connected to base. R_{E} is the emitter resistance. The collector junction is reversed biased.

Latches choosen are

- a)static shift registers
- b)any flipflop
- c)dynamic shift register
- d)multiplexers

Correct answer is option 'C'. Can you explain this answer?

Lancon Roh answered • 11 hours ago

The latches choosen are dynamic shift register as the structure will be continuously clocked.

For a half wave or full wave rectifier the Peak Inverse Voltage of the rectifier is always

- a)Greater than the input voltage
- b)Smaller than the input voltage
- c)Equal to the input voltage
- d)Greater than the input voltage for full wave rectifier and smaller for the half wave rectifier

Correct answer is option 'B'. Can you explain this answer?

Ayush Manchanpa answered • 11 hours ago

The peak input voltage is smaller than the input voltage due to the presence of diode(s). A single diode reduces the output voltage by approximately 0.7V.

A 50 V range voltmeter is connected across the terminals X and Y of the circuit shown in figure below. The voltage across the terminals are measured both under open circuit and loaded conditions.

The accuracy in the measurement of voltage across the terminals Xand /in percent is

- a)9.1%
- b)90.9%
- c)45.45%
- d)4.54%

Correct answer is option 'B'. Can you explain this answer?

REETA DEVI answered • 11 hours ago

The given circuit can be reduced to its Thevenin’s equivalent circuit as shown below.

True value of voltage across terminals X-Y is

Measured value of voltage across terminals X-Y is

ROOMA DEVI asked • 3 hours ago

Two resistors R_{1}, and R_{2} are connected in series with R_{1} = 28.7 Ω and R_{2} = 3.624 Ω. The total resistance to the appropriate number of significant figures can be written as

- a)32.324Ω
- b)32.4Ω
- c)32.32 Ω
- d)32.3Ω

Correct answer is option 'D'. Can you explain this answer?

Assertion (A): The total e.m.f. induced in a circuit is equal to the time rate of decrease of the total magnetic flux Sinking the circuit.

Reason (R): Changing magnetic field will induce on electric field.

Reason (R): Changing magnetic field will induce on electric field.

- a)Both A and R are true and R is a correct explanation of A.
- b)Both A and R are true but R is not a correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.

Correct answer is option 'B'. Can you explain this answer?

DEEPA KUMARI answered • 11 hours ago

Both assertion and reason are individually correct statements.

Since induced emf,

thus due to negative sign, the total emf induced is equal to the time rate of decrease of the total magnetic flux linking the circuit. (The negative sign supports the Lenz’s law).

Since induced emf,

thus due to negative sign, the total emf induced is equal to the time rate of decrease of the total magnetic flux linking the circuit. (The negative sign supports the Lenz’s law).

A rectangular loop of length a = 1 meter and width b = 80 cm is placed in a uniform magnetic field. What is the maximum value of induced emf if the magnetic flux density B - 0.1 Wb/m^{2} is constant and the loop rotates about the x-axis with a frequency of 50 Hz?

- a)32.65 volts
- b)18.54 volts
- c)28 volts
- d)25.13 volts

Correct answer is option 'D'. Can you explain this answer?

GEETA KUMARI answered • 11 hours ago

The induced emf in uniform magnetic field is given by

v = ω(ab) B sin ωt

or, v = ωAB sin ωt

(where, A = ab = Area of rectangular loop)

or

v = ω(ab) B sin ωt

or, v = ωAB sin ωt

(where, A = ab = Area of rectangular loop)

or

he figure below shows a half-bridge voltage source inverter supplying an RL-load with

R = 40Ω and L = (0.3/π)H. The desired fundamental frequency of the load voltage is 50 Hz. The switch control signals of the converter are generated using sinusoidal pulse width modulation with modulation index. M = 0.6. At 50 Hz, the RL-load draws an active power of 1.44 kW. The value of DC source voltage V_{DC} in volts is

R = 40Ω and L = (0.3/π)H. The desired fundamental frequency of the load voltage is 50 Hz. The switch control signals of the converter are generated using sinusoidal pulse width modulation with modulation index. M = 0.6. At 50 Hz, the RL-load draws an active power of 1.44 kW. The value of DC source voltage V

- a)300√2
- b)500
- c)500√2
- d)1000√2

Correct answer is option 'C'. Can you explain this answer?

KUMARI ASHA answered • 11 hours ago

A stationary closed Lissajous pattern on an oscilloscope has 3 horizontal tangencies and 2 vertical tangencies for a horizontal input with frequency 3 kHZ. The frequency of the vertical input is

- a)1.5 kHz
- b)2 kHz
- c)3 kHz
- d)4.5 kHz

Correct answer is option 'D'. Can you explain this answer?

SHABNAM THAKUR answered • 11 hours ago

If the primary line voltage rating is 3.3 kV (Y side) of a 25 kVA. Y -Δ transformer (the per phase turns ratio is 5:1), then the line current rating of the secondary side (in Ampere) is_____.

Correct answer is between '37,39'. Can you explain this answer?

KUMARI DOLMA answered • 11 hours ago

25KVA, Y - D, 3.3kV - Δ

N : N = 5 :1

Assertion (A): For high power applications, inverters are used instead of transistors.

Reason (R): For high power applications, inverter is operated in active region.

Reason (R): For high power applications, inverter is operated in active region.

- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true but R is not the correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.

Correct answer is option 'C'. Can you explain this answer?

MANJEET KAUR answered • 11 hours ago

In low-power electronic circuits oscillators are used for converting dc power into ac power. These oscillator use transistors for converting dc voltage into sinusoidal ac voltage. Since transistor is used in active region, therefore there is substantial loss of power which decreases efficiency. In high power applications inverters are used instead of transistors and the inverters operate in saturation region or cut-off region. Thus, assertion is true but reason is false.

Saryu Bakshi asked • 8 hours ago

The meter constant of a 230 V, 10 A watt hour meter is 1800 revolutions/kWh. The meter is tested at half load and rated voltage and unity p.f. The meter is found to make 80 revolutions in 138 sec. The meter error athalf load is _______

- a)0.41% slow
- b)0.41% fast
- c)0.82% fast
- d)0.82% slow

Correct answer is option 'C'. Can you explain this answer?

SHUBHAM KUMAR asked • 11 hours ago

The n-well collector is formed by:

- a)Lightly doped n-type epitaxial layer on p-Substrate
- b)Heavily doped n-type epitaxial layer on p-Substrate
- c)Lightly doped n-type diffused layer on p-Substrate
- d)Heavily doped n-type diffused layer on p-Substrate

Correct answer is option 'A'. Can you explain this answer?

RACHAKONDA VINOD asked • 11 hours ago

Assertion (A): The speed of operation of the parallel binary adder is high.

Reason (R): The parallel binary adder is said to generate its output immediately after the inputs are applied.

- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true but R is not the correct explanation of A
- c)A is true but R is False
- d)A is false but R is true

Correct answer is option 'D'. Can you explain this answer?

Manish Rathi asked • 11 hours ago

Which one of the following statements is not correct?

- a)Root loci can be used for analyzing stability and transient performance
- b)Root loci provide insight into system stability and performance
- c)Shape of the root locus gives idea of type of controller needed to meet design specification
- d)Root locus can be used to handle more than one variable at a time

Correct answer is option 'D'. Can you explain this answer?

Priya Tanwar asked • 12 hours ago

Most antenna consisting of a 50 meter long vertical conductor operates over a perfectly conducting ground plane. It is base fed at a frequency of 600 kHz. The radiation resistance of the antenna in ohms is

- a)
- b)
- c)
- d)20p
^{2}

Correct answer is option 'C'. Can you explain this answer?

Swathi Seelam asked • 12 hours ago

In a series circuit, which of the parameters remain constant across all circuit elements such as resistor, capacitor and inductor etcetera?

- a)Voltage
- b)Current
- c)Both voltage and current
- d)Neither voltage nor current

Correct answer is option 'B'. Can you explain this answer?

Varakrishna Vechalapu asked • 13 hours ago

Which of the following is true in case of a forward biased p-n junction diode?

- a)The positive terminal of the battery sucks electrons from the p-region
- b)The positive terminal of the battery injects electrons into the p-region
- c)The negative terminal of the battery sucks electrons from the p-region
- d)None of the above mentioned statements are true

Correct answer is option 'A'. Can you explain this answer?

Sunil Manjani asked • 13 hours ago

Distance near the skip distance should be used for sky-wave propagation

- a)to avoid tilting
- b)to prevent sky-wave and upper ray interference
- c)to avoid the Faraday effect
- d)so as not to exceed the critical frequency

Correct answer is option 'B'. Can you explain this answer?

MAYANK AGGARWAL asked • 14 hours ago

A 3-phase squirrel cage induction motor has maximum torque equal to twice the full-load torque. The per phase rotor resistance and per phase standstill reactance referred to stator are 0.2 Ω and 2 Ω respectively (Stator impedance is neglected). What is the ratio of motor starting toque to its full-load torque, if the motor is started by direct-on-line starter?

- a)0.396
- b)0.194
- c)0.198
- d)0.400

Correct answer is option 'A'. Can you explain this answer?

Sunil Manjani asked • 14 hours ago

In electrodynamometer type wattmeters, the inductance of pressure coil produces error. The error is

- a)constant irrespective of the power factor of the load
- b)higher at higher power factor loads
- c)higher at lower power factor loads
- d)highest at unity power factor loads

Correct answer is option 'C'. Can you explain this answer?

Sai Satish asked • 15 hours ago

Speed power product is measured as the product of

- a)gate switching delay and gate power dissipation
- b)gate switching delay and gate power absorption
- c)gate switching delay and net gate power
- d)gate power dissipation and absorption

Correct answer is option 'A'. Can you explain this answer?

Shailesh Patel asked • 16 hours ago

- a)Both A and R are correct and R is correct explanation of A
- b)Both A and R are correct but R is not correct explanation of A
- c)A is true, R is false
- d)A is false, R is true

Correct answer is option 'B'. Can you explain this answer?

DIVYA CHAUHAN asked • 16 hours ago

A 50 KVA, 11000/400 V Δ-Y distribution transformer has a resistance of 1% and reactance of 7% per unit. What is the transformer phase impedance referred to the high-voltage side?

- a)78.6 + j 608.2
- b)72.6 + j 508.2
- c)62.6 + j 908.2
- d)65.6 + j 786.2

Correct answer is option 'B'. Can you explain this answer?

ROHIT BISHT asked • 17 hours ago

The main reason for connecting a pulse transformer at the output stage of a thyristor triggering circuit is to

- a)reduce the turn on time of thyristor
- b)amplify the power of the triggering pulse
- c)avoid spurious triggering of the thyristor due to noise
- d)provide electrical isolation

Correct answer is option 'D'. Can you explain this answer?

ANIMESH SAHU asked • 18 hours ago

A single-phase half-bridge inverter has a resistive load of R = 3 Ω and the dc input voltage V_{dc} = 24 volts. The harmonic factor of the lowest order harmonic would be equal to

- a)33.33%
- b)25.0%
- c)66.67%
- d)50.0%

Correct answer is option 'A'. Can you explain this answer?

Fetching relevant content for you

Ask a question