i_{1}, i_{2} = ?

- a)2.6 A, 1.4 A
- b)2.6 A, -1.4 A
- c)1.6 A, 1.35 A
- d)1.2 A, -1.35 A

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

SHAILJA YASH answered • 31 minutes ago

i_{x} = i_{1} - i_{2}

....(i)

...(ii)

....(i)

...(ii)

The cut off frequency of the TEM wave is

- a)0
- b)1 GHz
- c)6 GHz
- d)infinity

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

SATYA DEVI answered • 31 minutes ago

Answer: a

Explanation: The TEM waves have both E and H perpendicular to the guide axis. Thus its cut off frequency is zero.

Explanation: The TEM waves have both E and H perpendicular to the guide axis. Thus its cut off frequency is zero.

Dhake Pavan asked • 51 minutes ago

In a shaded-pole induction motor, the rotor runs from the

- a)shaded portion to the unshaded portion of the pole while the flux in the former leads that in the latter
- b)shaded portion to the unshaded portion of the pole while the flux in the former lags that in the latter
- c)unshaded portion to the shaded portion while the flux in the former leads that in the latter
- d)unshaded portion to the shaded portion while the flux in the former lags that in the latter

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

Which of the following statements are correct?

- a)Root locus is for the negative feedback systems
- b)Complementary root locus is for the positive feedback systems
- c)Root locus is for the negative feedback and Complementary root locus is for the positive feedback systems
- d)Complementary root locus is for the negative feedback systems

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

NAMRTA BHARDWAJ answered • 31 minutes ago

Answer: c

Explanation: Root locus and Complementary root locus are complementary to each other.

Explanation: Root locus and Complementary root locus are complementary to each other.

Which one of the following applications software’s is used to obtain an accurate root locus for?

- a)LISP
- b)MATLAB
- c)dBase
- d)Oracle

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

BEENA DEVI answered • 31 minutes ago

Answer: b

Explanation: MATLAB stands for mathematics laboratory in which the input is in the form of the matrix and is the best software for drawing root locus.

Explanation: MATLAB stands for mathematics laboratory in which the input is in the form of the matrix and is the best software for drawing root locus.

Scientist Evans have contribution in :

- a)Asymptotic plots
- b)Polar plots
- c)Root locus technique
- d)Constant M and n circle

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

DURGA DEVI answered • 31 minutes ago

Answer: c

Explanation: Root locus technique is used to find the transient and steady state response characteristics by finding the locus of the gain of the system and this was made Scientist Evans .

Explanation: Root locus technique is used to find the transient and steady state response characteristics by finding the locus of the gain of the system and this was made Scientist Evans .

The constant N loci represented by the equation x^{^}2+x+y^{^}2=0 is for the value of phase angle equal to:

- a)-45°
- b)0°
- c)45°
- d)90°

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

AMARJEET KAUR answered • 31 minutes ago

Answer: d

Explanation: Centre = (-0.5, 0)

Centre of N circle is (-1/2, 1/2N)

N =tanα

α =90°.

Explanation: Centre = (-0.5, 0)

Centre of N circle is (-1/2, 1/2N)

N =tanα

α =90°.

- a)Both A and R are correct and R is correct explanation for A
- b)Both A and R are correct but R is not correct explanation for A
- c)A is correct R is wrong
- d)A is wrong R is correct

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

SANGEETA DEVI answered • 31 minutes ago

Large value capacitor cannot be fabricated on a chip.

For a Si transistor connected as shown in the fig. V_{BE} = 0.7V. Given that the reverse saturation current of the junction at room temperature is 200 nA, the I_{C} is given by

- a)78.93 A
- b)147.86 mA
- c)154.13 mA
- d)72.26 mA

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

SONIKA AMAR answered • 31 minutes ago

Since base is connected to collector of the transistor, therefore it works as a diode

I_{c} = I_{0}{e^{VBE/ηVT}-1}

Here, I_{0} = 200 nA, V_{BE} = 0.7, η = 2, V_{T} = 26 mV

So, I_{c} = 147.86 mA

A 220 V series motor takes a current 35 amp and runs at 500 rpm. Armature resistance = and series field resistance = . If iron and friction losses amount to Whatis the armature torque

- a)134N
- b)138N
- c)154N
- d)156N

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

SARITA NRAIN answered • 31 minutes ago

Intrinsic impedance or charcteristic impedance of the non-conducting medium in the free space is

- a)120 π Ohms
- b)80 π Ohms
- c)160 π Ohms
- d)60 π Ohms

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

KANCHAN HIRA answered • 31 minutes ago

Intrinsic impedance or characteristic impedance of the non-conducting medium in free space is given as

If the system matrix of a linear time invariant continuous system is given by

Its characteristic equation is given by:

Its characteristic equation is given by:

- a)s
^{2}+5s+3=0 - b)s
^{2}-3s-5=0 - c)s
^{2}+3s+5=0 - d)s
^{2}+s+2=0

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

DURGI DEVI answered • 13 hours ago

Answer: a

Explanation: The transfer function is calculated by the state variable analysis and hence the transfer function is calculated by state transition matrix and taking the inverse Laplace transform.

Explanation: The transfer function is calculated by the state variable analysis and hence the transfer function is calculated by state transition matrix and taking the inverse Laplace transform.

Consider the following statements:

1. The delay time is the time required to reach 50% of the final value in the first time.

2. The rise time is the time required for the response to rise from 10% to 90% of its final value for underdamped systems.

3. The rise time is the time required for the response to rise from 0 to 100% for the underdamped systems.

Which of these statements are correct?

1. The delay time is the time required to reach 50% of the final value in the first time.

2. The rise time is the time required for the response to rise from 10% to 90% of its final value for underdamped systems.

3. The rise time is the time required for the response to rise from 0 to 100% for the underdamped systems.

Which of these statements are correct?

- a)1,2 and 3 only
- b)1 and 2 only
- c)1 and 3 only
- d)2 and 3 only negative real axis

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

RAJNI DEVI answered • 13 hours ago

Answer: c

Explanation: The rise time is the time required for the response to rise from 10% to 90% of its final value for overdamped systems.

Explanation: The rise time is the time required for the response to rise from 10% to 90% of its final value for overdamped systems.

The range of K for the stability of system is 0<K<100. For K =10, The gain Margin of the system

- a)10
- b)5
- c)0.1
- d)0.5

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

KIRNA DEVI answered • 13 hours ago

Answer: a

Explanation: Gain margin of the system is 10.

Explanation: Gain margin of the system is 10.

Omkar Kandekar asked • 2 hours ago

Galloping in transmission line conductors arises generally due to

- a)Asymmetrical layers of ice formation
- b)Vortex phenomenon in light winds
- c)Heavy weight of the line conductor configuretions
- d)Adoption of horizontal conductor configuretions

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

In a bode magnitude plot, which one of the following slopes would be exhibited at high frequencies by a 4th order all-pole system?

- a)-80dB/decade
- b)-40 dB/decade
- c)40 dB/decade
- d)80 dB/decade

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

NAINCY PRAKASH answered • 13 hours ago

Answer: a

Explanation: A 4th order all pole system means that the system must be having no zero or s-term in numerator and s^{4} terms in denominator. One pole exhibits -20dB/decade slope, so 4 pole exhibits a slope of -80 dB /decade.

Explanation: A 4th order all pole system means that the system must be having no zero or s-term in numerator and s

Gain margin is:

- a)It is a factor by which the system gain can be increased to drive it to the verge of instability
- b)It is calculated at gain cross over frequency
- c)It is calculated at phase cross over frequency
- d)Both a and c

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

SUNITA KALYAN answered • 13 hours ago

Answer: d

Explanation: Gain margin is a factor by which the system gain can be increased to drive it to the verge of instability and is calculated at phase cross over frequency.

Explanation: Gain margin is a factor by which the system gain can be increased to drive it to the verge of instability and is calculated at phase cross over frequency.

The dc output voltage of the circuit is

- a)4.3 V
- b)1.369 V
- c)3.87 V
- d)1.94 V

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

INDU SHARMA answered • 13 hours ago

This is half wave Rectifier, because in +ve cycle both the diode will be in forward biased.

For +ve cycle,

V_{o max} = I_{max}. R_{eq}

2.59 x 10^{-3} x 1.66 x 10^{3}

4.299 volt.

A TL supported by 3 insulation disc, the maximum voltage of each disc is 25 KV. Find the operating voltage per phase of the line given efficiency η = 78%

- a)58.5 KV
- b)19.6 KV
- c)62.5 KV
- d)69.6 KV

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

DIVYA CHAUHAN answered • 13 hours ago

as (V

For a linear time invariant system, an optimal controller can be designed if

- a)the system is unstable but observable
- b)the system is controllable and observable
- c)the system is stable and unobservable
- d)the system is uncontrollable but stable

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

JYOTI RANDEEP answered • 13 hours ago

An optimal controller for an LTI system can be designed provided the system is both controllable and observable

What is the value of multiplier resistance on the 50 V range of a dc voltmeter that uses a 500 μA meter movement with an internal resistance of 1 kΩ?

- a)109 kΩ
- b)199 kΩ
- c)99 kΩ
- d)119 kΩ

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

SUMAN LATA answered • 13 hours ago

The sensitivity of 500 μA meter movement is given by,

The value of the multiplier resistance can be obtained as

The value of the multiplier resistance can be obtained as

Which one of the following statements is correct? Nichol’s chart is useful for the detailed study analysis of:

- a)Closed loop frequency response
- b)Open loop frequency response
- c)Close loop and open loop frequency responses
- d)None of the above

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

ANJU BALA answered • 13 hours ago

Answer: a

Explanation: Nichol’s chart is useful for the detailed study analysis of closed loop frequency response.

Explanation: Nichol’s chart is useful for the detailed study analysis of closed loop frequency response.

ATUL RANJAN asked • 4 hours ago

Assertion (A) : It is necessary to keep the thyristor reverse biased for a finite period before a forward anode voltage can be reapplied.

Reason (R) : Once the SCR starts conducting an appreciable forward current, the gate has no control on it and the device can be brought back to the blocking state only by reducing the forward current level below that of the holding current.

Reason (R) : Once the SCR starts conducting an appreciable forward current, the gate has no control on it and the device can be brought back to the blocking state only by reducing the forward current level below that of the holding current.

- 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 'B'. Can you explain this answer?

Kunal Rauthan asked • 6 hours ago

In silicon at T = 300 K the thermal-equilibrium concentration of electron is n_{0} = 5 x 10^{4} cm^{-3 }The hole concentration is

- a)4.5 x 10
^{15}cm^{-3} - b)4.5 x 10
^{15}m^{-3} - c)0.3 x 10
^{-6}cm^{-3} - d)0.3 x 10
^{-6 }m^{-3}

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

Amit Parashar asked • 6 hours ago

A 50 Hz, 11 kV, 3 phase alternator with earthed neutral having a reactance of 3 ohms per phase and is connected to a bus bar through a circuit breaker, if the distributed capacitance upto CB between the phase and neutral is 0.01 μ F.

What is the peak re striking voltage?

- a)18.36 kV
- b)17.96 kV
- c)15.96 kV
- d)12.65 kV

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

ABDUL KAIF asked • 6 hours ago

A 3 phase induction motor is fed by a 3 phase ac regulator to change the stator voltage. The variation in speed will be more if

- a)load torque is constant
- b)load torque increases with increase in speed
- c)load torque decreases with increase in speed
- d)either (a) or (b)

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

Digvijay Kumar asked • 7 hours ago

If the positive,-negative-and zero-sequence reactances of an element of a power system are 0.3, 0.3 and 0.8 pu respectively, then the element would be a

- a)synchronous generator.
- b)synchronous motor.
- c)static load.
- d)transmission line.

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

Anurag Kumar asked • 8 hours ago

Pinkesh Patel asked • 8 hours ago

The Voltage Source Inverter (VSI) shown in the figure below is switched to provide a 50Hz, square wave ac output voltage v_{o} across an RL load. Reference polarity of v_{o} and reference direction of the output current i_{o} are indicated in the figure. It is given that R = 3 ohms, L = 9.55mH.

Appropriate transition i.e., Zero Voltage Switching (ZVS) / Zero Current Switching (ZCS) of the IGBTs during turn-on / turn-off is

- a)ZVS during turn off
- b)ZVS during turn-on
- c)ZCS during turn off
- d)ZCS during turn-on

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

Suraj Kumar asked • 9 hours ago

Which of the following device can be used as a phase advancer ?

- a)3-f induction motor squirrel cage type
- b)3-f induction motor slip ring type
- c)synchronous motor working at leading power factor
- d)synchronous motor working at lagging power factor

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

Gurpreet Singh asked • 9 hours ago

Consider the following statements:

In 8085 microprocessor, data - bus and addressbus are multiplexed in order to

1. Increase the speed of microprocessor

2. Reduce the number of pins.

3. Connect more peripheral chips.

Which of the above statement is/are correct?

- a)1 only
- b)2 only
- c)2 and 3
- d)1, 2 and 3

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

SANKET KUMAR asked • 10 hours ago

A network function contains only poles whose real-parts are zero or negative. The network is

- a)always stable.
- b)stable, if the jω-axis poles are simple.
- c)stable, if the jω-axis poles are at most of multiplicity 2.
- d)always unstable.

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

ANSH GUPTA asked • 10 hours ago

In the given logic diagram the propagation delays of both the gates are 20 nsec each. The output y is at logic ‘1’ from a long time and at t = 0, the input x change from 0 to 1, so the output goes momentary to logic 0, determine the time required by the output to again maintain its level at logic 1.

- a)0 nsec
- b)20 nsec
- c)40 nsec
- d)60 nsec

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

Sunil Manjani asked • 10 hours ago

For a message signal m(t) = cos (2πf_{m}t) and carrier of frequency f_{c}, which of the following represents a single sideband (SSB) signal

- a)cos (2 π f
_{m}t) cos (2 π f_{c}t) - b)cos (2π f
_{c}t) - c)cos [2 π(f
_{c}+f_{m})t] - d)[1 + cos (2 π f
_{m}t) cos (2 π f_{c}t)

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

PRIYANKA DEVI asked • 10 hours ago

A magnetic ring has a mean circumference of 20 cm and a cross section of 20 cm^{2} and has 800 numbers of turns of wire. When the exciting current is 5A, the flux is 2 mWb. The relative permeability of iron is nearly

- a)3.98
- b)398
- c)0.398
- d)39.8

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

Vikash Kumar asked • 10 hours ago

A squirrel cage induction motor having a rated slip of 2% on full load has a starting torque of 50% of full load torque. The starting current is

- a)two times the full load current
- b)four times the full load current
- c)five times the full load current
- d)equal to the full load current

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

Potu Madhavi asked • 12 hours ago

For the same voltage drop, increasing the voltage of a distributor n-times.

- a)reduces the x-section of the conductor by n times
- b)increases the x-section of the conductor by n times
- c)reduces the x-section of the conductor by n
^{2}times - d)increases the x-section of the conductor by n
^{2 }times.

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

Digvijay Kumar asked • 13 hours ago

The load currents in short-circuit calculation are neglected because

1. short-circuit currents are much larger than load currents.

2. short-circuit currents are greatly out of phase with load currents.

Which of these statement(s) is/are correct ?

1. short-circuit currents are much larger than load currents.

2. short-circuit currents are greatly out of phase with load currents.

Which of these statement(s) is/are correct ?

- a)neither 1 nor 2
- b)2 alone
- c)1 alone
- d)1 and 2

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

Bhavan Verma asked • 15 hours ago

If a feedback control system has its open loop transfer function G(s)H(s) = K/(s-2)(s^{2}+3s+5) has the root locus plot which intersects the imaginary axis at s =0, then the value of K at this point will be

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

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

SATYA DEVI asked • 15 hours ago

Shunt reactors are needed

- a)to boost receiving end voltage under light loads.
- b)to boost receiving end voltage under heavy loads.
- c)to bring down receiving end voltage at light loads.
- d)to bring down receiving end voltage under heavy loads.

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

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