To get minimum harmonic distortion in the output, a 3-Ф to 3-Ф cyclo-converter requires : (A) 12 SCRs (B) 18 SCRs (C) 36 SCRs (D) 72 SCRs
Last Answer : To get minimum harmonic distortion in the output, a 3-Ф to 3-Ф cyclo-converter requires : 36 SCRs
Show More
94 views
1 answer
asked
Apr 30, 2018
by
anonymous

Explain different gate drives techniques with base circuits and key features.
Show More
560 views
0 answers
asked
Mar 10, 2018
by
anonymous

Explain how sinusoidal AC voltage is generated by using simple one loop generator.
Last Answer : An electric current produced by means of electrical machine is known as generator which converts mechanical energy into electrical energy. When conductor cuts the magnetic flux, emf induced in it. (Faraday' ... upon position of armature. The nature of emf is alternating as shown by the waveform.
Show More
1.5k views
1 answer
asked
Sep 7, 2018
by
anonymous

Sinusoidal Steady-State Analysis mesh analysis
Last Answer : Sinusoidal Steady-State Analysis mesh analysis
Show More
84 views
1 answer
asked
Apr 3, 2020
by
anonymous

Sinusoidal Steady-State Analysis - nodal analysis super node problem solution 2
Last Answer : Sinusoidal Steady-State Analysis - nodal analysis super node problem solution 2
Show More
96 views
1 answer
asked
Apr 3, 2020
by
anonymous

Sinusoidal Steady-State Analysis - nodal analysis super node problem solution
Last Answer : Sinusoidal Steady-State Analysis - nodal analysis super node problem solution
Show More
113 views
1 answer
asked
Apr 3, 2020
by
anonymous

Sinusoidal Steady-State Analysis - Using nodal analysis, find node voltages in the circuit.
Last Answer : Sinusoidal Steady-State Analysis - Using nodal analysis, find node voltages in the circuit.
Show More
173 views
1 answer
asked
Apr 3, 2020
by
anonymous

Adding Sinusoidal Functions
Last Answer : Adding Sinusoidal Functions
Show More
62 views
1 answer
asked
Apr 1, 2020
by
anonymous

An ac voltmeter using full -wave rectification and having a sinusoidal input has an ac sensitivity equal to (1) 1.414 times dc sensitivity (2) dc sensitivity (3) 0.9 times dc sensitivity (4) 0.707 times dc sensitivity
Last Answer : An ac voltmeter using full -wave rectification and having a sinusoidal input has an ac sensitivity equal to 0.9 times dc sensitivity
Show More
606 views
1 answer
asked
Apr 30, 2018
by
anonymous

When the phase difference between two sinusoidal quantities is 90° they are said to be ______ A) Phase right angle B) Phase quadrature C) Phase sinuright D) None of these
Last Answer : When the phase difference between two sinusoidal quantities is 90° they are said to be Phase quadrature
Show More
208 views
1 answer
asked
Apr 29, 2018
by
anonymous

The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of______degrees.
Last Answer : 45
Show More
838 views
2 answers
asked
Mar 24, 2018
by
anonymous

A sinusoidal voltage of 5 Hz is applied to the field of a shunt generator. The armature voltage wave?
Last Answer : A sinusoidal voltage of 5 Hz is applied to the field of a shunt generator. The armature voltage wave will be of 5 Hz.
Show More
179 views
1 answer
asked
Mar 21, 2018
by
anonymous

The second harmonic distortion is defined as the A) Ratio of amplitude of second harmonic component in the output to that of the fundamental frequency B) Harmonic distortion due to only second harmonic component C) Sum of distortion of first and second harmonic components in the output
Last Answer : The second harmonic distortion is defined as the Ratio of amplitude of second harmonic component in the output to that of the fundamental frequency
Show More
115 views
1 answer
asked
Jun 18, 2018
by
anonymous

The time period of third harmonic of power supply frequency, in milliseconds, is (A) 20 (B) 3.33 (C) 6.66 (D) 60
Last Answer : The time period of third harmonic of power supply frequency, in milliseconds, is 6.66
Show More
541 views
1 answer
asked
Apr 28, 2018
by
anonymous
.jpg)
The fractional-pitch used for eliminating 7th harmonic from the emf wave of an alternator is (A) 2/3 (B) 5/6 (C) 7/8 (D) 6/7
Last Answer : The fractional-pitch used for eliminating 7th harmonic from the emf wave of an alternator is 6/7
Show More
500 views
1 answer
asked
Apr 28, 2018
by
anonymous

What is the harmonic filter?
Last Answer : It is being used to supress the input voltage distortion at input side of any electrical equipment. This distortion is created by other electrical loads like motor, drives etc nearby connected with ... for a range of harmonics or specific harmonics like 3rd harmonics 5th harmonics, 7th harmonics.
Show More
81 views
1 answer
asked
Mar 10, 2018
by
anonymous

What is harmonic in power quality?
Show More
59 views
0 answers
asked
Mar 10, 2018
by
anonymous

Explain the “mitigation of power theft” and “faulty meter replacement” for energy conservation techniques to reduce commercial losses.
Last Answer : Energy conservation techniques to reduce commercial losses: 1. Mitigation of Power Theft: Power theft being the most important issue which all of the service providing utilities ... agricultural sector. Prepaid meters may prove effective measures against unauthorized abstraction of energy.
Show More
125 views
1 answer
asked
Sep 22, 2018
by
anonymous
.jpg)
Explain any two energy conservation techniques in fan.
Last Answer : Following are energy conservation techniques in Fans : 1) Use the electronic regulators instead of conventional regulator: Function of regulator is to control the speed of the fan. The conventional regulators ... 't forget to properly maintain your electric fan and keep it in good working order.
Show More
793 views
1 answer
asked
Sep 22, 2018
by
anonymous

Explain frequency domain synthesis. Which techniques fall into the category of frequency domain synthesis?
Show More
93 views
0 answers
asked
Mar 2, 2018
by
anonymous

Resume Techniques for Getting Noticed
Last Answer : Resume Writing Techniques Imagine that you are applying for a job. An employer gets hundreds of resumes for that position (this is not uncommon for today's job market). Your potential ... from the position advertisement to prove that you are exactly the person the employer wants to hire.
Show More
1 view
1 answer
.jpg)
32 With S2 closed and S1 open, the current waveform in the delta winding will be [GATE 2009] A. a sinusoidal at fundamental frequency B. flat-topped with third harmonic C. only third-harmonic D. none of these
Last Answer : C. Only third harmonic
Show More
14 views
1 answer

[31] With both S1 and S2 open, the core flux waveform will be [GATE 2009] A. a sinusoidal at fundamental frequency B. flat-topped with third harmonic C. peaky with third-harmonic D. none of these
Last Answer : B. Flat topped with third harmonic
Show More
22 views
1 answer

In single pulse modulation of PWM inverters, third harmonic can be eliminated if pulse width is equal to (a) 30o (b) 60o (c) 120o (d) 150o
Last Answer : In single pulse modulation of PWM inverters, third harmonic can be eliminated if pulse width is equal to 120o
Show More
246 views
1 answer
asked
May 13, 2018
by
anonymous

What are the methods of reduction of harmonic content?
Last Answer : a. Transformer connections b. Sinusoidal PWM c. Multiple commutation in each cycle d. Stepped wave inverters
Show More
3 views
1 answer

State the need for reduction of harmonics in inverters. Enlist the various methods for reduction of harmonics in inverter output.
Show More
55 views
0 answers
asked
Mar 10, 2018
by
anonymous

The sinusoidal wave `y(x,t) = ym sin(kx-omegat)` is incident on the fixed end of a string at `x = L`. The reflected wave is given by :-
Last Answer : The sinusoidal wave `y(x,t) = ym sin(kx-omegat)` is incident on the fixed end of a string at `x = L` ... (kx+omegat-kL)` D. `y_(m)sin(kx+omegat-2kL)`
Show More
6 views
1 answer

What are the features for Human Hepatic Sinusoidal Endothelial Cells?
Last Answer : HHSEC are isolated from human liver. HHSEC are cryopreserved immediately after purification and delivered frozen. Each vial contains >5 x 10^5 cells in 1 ml volume. HHSEC are characterized by immunofluorescent ... ). HHSEC are negative for HIV-1, HBV, HCV, mycoplasma, bacteria, yeast and fungi.
Show More
2 views
1 answer

Current flowing in only one direction is called ___________. A. alternating current B. omnidirectional current C. direct current D. sinusoidal current
Last Answer : Answer: C
Show More
1 view
1 answer

Which of the wave shapes shown in the illustration is termed a sinusoidal wave? EL-0088 A. A B. B C. C D. D
Last Answer : Answer: C
Show More
1 view
1 answer

Ammeters and voltmeters used in sinusoidal AC power systems indicate which of the following values of the waveforms measured? A. Peak value B. Root-mean-square value C. Average value D. Maximum value
Last Answer : Answer: B
Show More
13 views
1 answer

The sinusoidal carrier is pulsed so that one of the binary states is represented by a carrier while the other is represented by its absence. A. FSK B. ASK C. PSK D. QAM
Last Answer : B. ASK
Show More
1 view
1 answer

If the mean stress value for a sinusoidal stress function is zero, then this type of stress falls in which category? a) Fluctuating Stresses b) Alternating Stresses c) Repeated Stresses d) Reversed Stresses
Last Answer : d) Reversed Stresses
Show More
4 views
1 answer

Average power dissipated in resistor if sinusoidal p.d of peak value 25 V is connected across a 20 Ω resistor is A. 15.6 W B. 15 W C. 16 W D. 17 W
Last Answer : 15.6 W
Show More
15 views
1 answer

The first critical speed of an automobile running on a sinusoidal road is calculated by (modeling it as a single degree of freedom system) A Resonance B Approximation C Superposition D Rayleigh quotient
Last Answer : A Resonance
Show More
2 views
1 answer

The first critical speed of an automobile running on a sinusoidal road is calculated by (modeling it as a single degree of freedom system) a) Resonance b) Approximation c) Superposition d) Rayleigh quotient
Last Answer : a) Resonance
Show More
2 views
1 answer

Q-7 during welding process, why sinusoidal wave form is converted in to the square wave form?
Last Answer : In sinusoidal wave, we get maximum energy at one point only. So for the more amount of maximum energy we can get by converting the sinusoidal wave form in to the square wave form, and more penetration and deposition rate is achieved due to maximum energy.
Show More
8 views
1 answer
asked
Aug 16, 2021
by
anonymous

The output waveform produced due to time base generator in a CRO is a) saw tooth b) sinusoidal c) linear d) helical
Last Answer : a) saw tooth
Show More
34 views
1 answer
asked
Aug 4, 2021
by
anonymous

The current drawn by the line due to corona losses is (a) non-sinusoidal (b) sinusoidal (c) triangular (d) square
Last Answer : (a) non-sinusoidal
Show More
13 views
1 answer

Describe the operation of inductor with sinusoidal AC voltage as input. Draw waveform for voltage across and current through the inductor. Draw its phasor representation.
Last Answer : An alternating voltage is applied to a purely inductive coil, a back e.m.f. is produced due to self-inductance of the coil. The back e.m.f. at every step, opposes the rise of fall of current through the coil ... drop, the applied voltage has to overcome this self induced e.m.f. only.
Show More
74 views
1 answer
asked
Apr 6, 2021
by
anonymous

Define Amplitude and Phase of Sinusoidal quantity.
Last Answer : Amplitudes are expressed either as instantaneous values or mostly as peak values. Amplitude is the fluctuation or displacement of a wave from its mean value. Phase is the position of a ... . Phase an expression of relative displacement between or among waves having the same frequency .
Show More
166 views
1 answer
asked
Aug 21, 2019
by
anonymous

Draw sinusoidal waveform of 3 phase emf and indicate the phase sequence.
Last Answer : Phase sequence is R-Y-B.
Show More
510 views
1 answer
asked
Jul 10, 2019
by
anonymous

Two sinusoidal signals having the same amplitude and frequency are applied to the X and Y inputs of a CRO. The observed Lissajous figure is straight line. The phase shift between the two signals would be (1) Zero (2) 90 degrees (3) Either zero or 180 degrees (4) Either 90 degrees or 270 degrees
Last Answer : Two sinusoidal signals having the same amplitude and frequency are applied to the X and Y inputs of a CRO. The observed Lissajous figure is straight line. The phase shift between the two signals would be (1) Zero (2) 90 degrees (3) Either zero or 180 degrees (4) Either 90 degrees or 270 degrees
Show More
394 views
1 answer
asked
May 28, 2018
by
anonymous

The rms value of the current in a wire which carries a d.c. current of 10 A and a sinusoidal alternating current of peak value 20 A is (A) 10 A (B) 14.14 A (C) 15 A (D) 17.32 A
Last Answer : The rms value of the current in a wire which carries a d.c. current of 10 A and a sinusoidal alternating current of peak value 20 A is 17.32 A
Show More
276 views
1 answer
asked
May 18, 2018
by
anonymous

The direction of rotation of a 3-phase induction motor is clockwise when it is supplied with 3-phase sinusoidal voltage having phase sequence A-B-C. For counter clockwise rotation of the motor, the phase sequence of the power supply should be (A) B-C-A (B) C-A-B (C) A-C-B (D) B-C-A or C-A-B
Last Answer : The direction of rotation of a 3-phase induction motor is clockwise when it is supplied with 3-phase sinusoidal voltage having phase sequence A-B-C. For counter clockwise rotation of the motor, the phase sequence of the power supply should be A-C-B
Show More
590 views
1 answer
asked
May 17, 2018
by
anonymous

Two sinusoidal signals of the same frequency are displayed on a dual-trace oscilloscope. One complete cycle of each signal covers 6 cm of the horizontal scale and the starting point of the horizontal scale and the starting ... between the two signals in degrees is (a) 30 (b) 45 (c) 60 (d) 90
Last Answer : Two sinusoidal signals of the same frequency are displayed on a dual-trace oscilloscope. One complete cycle of each signal covers 6 cm of the horizontal scale and the starting point of the horizontal ... signals are separated by 0.5 cm. The phase difference between the two signals in degrees is 30
Show More
170 views
1 answer
asked
May 15, 2018
by
anonymous

In a two -channel oscilloscope operating in x -y mode, two in -phase 50 Hz sinusoidal waveforms of equal amplitude are fed to the two channels. What will be the resultant pattern on the screen ? (a) An ellipse (b) A parabola (c) Straight line inclined at 45° with respect to x-axis (d) A circle
Last Answer : In a two -channel oscilloscope operating in x -y mode, two in -phase 50 Hz sinusoidal waveforms of equal amplitude are fed to the two channels. What will be the resultant pattern on the screen ? (a) An ellipse (b) A parabola (c) Straight line inclined at 45° with respect to x-axis (d) A circle
Show More
76 views
1 answer
asked
Apr 23, 2018
by
anonymous
.jpg)
Polyphase generators produce simultaneous multiple sinusoidal voltages that are separated by certain constant: A. Phase -angles B. Frequency C. Voltage D. Current
Last Answer : Polyphase generators produce simultaneous multiple sinusoidal voltages that are separated by certain constant: Phase -angles
Show More
125 views
1 answer
asked
Apr 12, 2018
by
anonymous

When a sinusoidal voltage wave drives a Schmitt Trigger, the output is a: A) Triangular wave B) Rectified sine wave C) Rectangular wave D) Trapezoidal wave
Show More
327 views
0 answers
asked
Apr 9, 2018
by
anonymous

What is peak factor of a sinusoidal wave? (A) 1.11 (B) 1.414 (C) 3.142 (D) 4.44
Show More
107 views
0 answers
asked
Apr 5, 2018
by
anonymous
