Last Answer : NO IT ONLY CONVERT FROM AC TO DC BECAUSE DIODE WHICH ARE USED IN IT, ARE UNIDIRECTIONAL.
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149 views
2 answers
asked
Sep 13, 2017
by
anonymous

2.6k views
0 answers
asked
Jul 25, 2019
by
anonymous

How is a thyristor used to convert AC to DC?
Last Answer : thyristor
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123 views
1 answer
asked
Mar 19, 2018
by
anonymous

Can transformer convert AC to DC?
Last Answer : No, Transformer cannot convert AC to DC.
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3.0k views
9 answers
asked
Dec 9, 2017
by
anonymous

operation of half wave rectifier type AC Voltmeter.
Last Answer : Half-wave Rectifier Voltmeter The d'Arsonval meter movement only responds to the average or dc value of the current through the moving coil. In order to measure alternating ... ) input voltage signal alternating signal needs to be rectified first by using diode rectifier to produce
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270 views
1 answer
asked
Sep 4, 2019
by
anonymous

An AC supply of 230 V is applied to a half-wave rectifier circuit through a transformer having primary to secondary turn’s ratio 12:1. The peak inverse voltage is A) 8.62 V B) 12 V C) 19.17 V D) 27.11 V
Last Answer : An AC supply of 230 V is applied to a half-wave rectifier circuit through a transformer having primary to secondary turn’s ratio 12:1. The peak inverse voltage is A) 8.62 V B) 12 V C) 19.17 V D) 27.11 V
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260 views
1 answer
asked
Jun 18, 2018
by
anonymous

Last Answer : Igbt alone cant convert dc to ac. igbt half bridge or full bridge or three phase topology could be used to convert dc to ac. also igbt gates should be driven by microcontroller or pwm/spwm gate driving signals ... e4(-) and g4 c2e1 and c4e3 pins are AC output pins. its name is igbt inverter.
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187 views
1 answer
asked
Feb 24, 2018
by
Amit Sharma

State the modification to be done in dc series motor to work satisfactorily as ac series motor. State applications of ac series motor.
Last Answer : Modifications are necessary in a dc series motor so that it operates satisfactorily on ac supply. The modifications are as follows: 1) AC series motor is built with a few field turns as ... and grinders 5) High speed vacuum cleaners 6) Sewing machines 7) Food processors 8) Drilling machine
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384 views
1 answer
asked
May 7, 2020
by
anonymous

Compare the AC and DC Arc lamps.
Last Answer : AC Arc Lamp DC Arc Lamp Cross section area of electrode is same Cross section area of electrode is positive rod is twice that of negative rod Series inductor is used for stability ... supply is used for DC arc lamp Luminous efficiency is less Luminous efficiency is high
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251 views
1 answer
asked
May 3, 2020
by
anonymous

What is the advantage of AC over DC electrical transmission?
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82 views
0 answers
asked
Apr 26, 2020
by
anonymous
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Why are DC motors used in trains and not AC motors ?
Last Answer : The reason is torque. torque is inversely proportional to speed..i.e when th knowe train comes to rest position to motion.. initial speed is zero..so it requires high starting torque for ... current will flow through field and armature coils then maximum torque is available at the intial condition.
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162 views
1 answer
asked
Sep 3, 2019
by
anonymous

Why is AC considered more efficient than DC?
Last Answer : Ac is more efficient than dc because it is easy to maintain and change the voltage of ac for transmission and distribution purpose. Plant cost of ac transmission is much lower compared to dc transmission. When fault occurs it is easy to interrupt ac supply.
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100 views
1 answer
asked
Aug 28, 2019
by
anonymous
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Which is more dangerous AC or DC and why ?
Last Answer : Dc is more dangerous than Ac because in Ac the voltage will varies but in dc the constant voltage
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151 views
2 answers
asked
Aug 28, 2019
by
anonymous

What is the conversion between. AC to AC ? DC to DC? AC to DC? DC to AC ?
Last Answer : 1.ac to ac is regulation 2.dc to dc is chopper 3.ac to dc is rectifier 4.dc to ac is inverter
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101 views
1 answer
asked
Aug 15, 2019
by
anonymous

Is the power line voltage available in our homes a dc or an ac voltage?
Last Answer : The power line voltage available in our homes is AC. Mobile dwellings are the most commonly DC-supplied homes and even then they tend to include AC supply for heavier loads.
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5.2k views
1 answer
asked
Jun 29, 2019
by
anonymous

Do you think is DC better than AC to transmit energy?
Last Answer : In Long distance DC transmission will be better in cost. It requires more equipments for flexiblity In short distance AC transmission is better in cost. It is more Flexible
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468 views
2 answers
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Distinguish between AC and DC.
Last Answer : Particulars Direct Current Alternating Current Definition It is the current whose magnitude and direction do not change with respect to time. It is the current whose ... system, electroplating, Battery charging, Traction. AC machines, Domestic and industrial supply.
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464 views
2 answers
asked
Aug 8, 2018
by
anonymous

The main advantage of AC over DC is: (A) Conversion flexibility from one voltage level to other (B) AC can be easily converted into DC by using a rectifier (C) AC is easy to maintain & can be easily distributed at long distances (D) All of the above
Last Answer : Ac is easy to maintain and ac can be easily converted to dc by rectifier .There is no commutator for conversion in ac that's why ac machines are weight less and more efficiency.ac machines occupy less space than dc .
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144 views
2 answers
asked
May 8, 2018
by
anonymous

Which of the following motors can run on both AC and DC? A) Universal motor B) Dual wattage motor C) Flexible motor D) All the above
Last Answer : Which of the following motors can run on both AC and DC? A) Universal motor B) Dual wattage motor C) Flexible motor D) All the above
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181 views
1 answer
asked
Apr 29, 2018
by
anonymous

What is the difference between an AC and DC generator?
Last Answer : The generator which generates DC voltage is called DC generator and generator which generates AC voltage is called AC generator (or) Alternator. In DC generator armature is rotated and field winding ... generator. A DC generator can generate low voltages but an AC generator can generate upto 11kv.
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317 views
1 answer
asked
Mar 15, 2018
by
anonymous

Do cell phones use AC or DC current?
Last Answer : DC of course.
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210 views
2 answers
asked
Mar 14, 2018
by
anonymous

Is current from a battery AC or DC?
Last Answer : The current from the battery is DC
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135 views
2 answers
asked
Mar 14, 2018
by
anonymous

Is electricity generated in AC or DC?
Last Answer : Electricity is generated in AC.
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131 views
1 answer
asked
Mar 10, 2018
by
anonymous

What is the difference between AC and DC drive?
Last Answer : AC means alternating current It's Frequency is 50hz Dc means direct current ItsI Frequency is 0Hz
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156 views
1 answer
asked
Mar 10, 2018
by
anonymous

What is the use of AC and DC drives?
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84 views
0 answers
asked
Mar 10, 2018
by
anonymous

Is it AC or DC electricity in the home?
Last Answer : Obviously its A.C
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200 views
4 answers
asked
Mar 10, 2018
by
anonymous

are AC and DC resistances same?
Last Answer : Resistance is the ability of a circuit or element (which is called resistor) to oppose current. Examples of Resistors with the ability of high resistance are Wood, Air, Mica, Glass, Rubber, Tungsten ... constant. Therefore, only the original resistance of wire comes into play. they are not the same
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82 views
1 answer
asked
Oct 18, 2017
by
anonymous

Last Answer : Induction motor is a AC motor it is also known as asynchronous motor .
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100 views
1 answer
asked
Sep 9, 2017
by
anonymous

Single-phase mid-point controlled rectifier with RL load
Last Answer : Single-phase mid-point controlled rectifier with RL load : The circuit configuration of single-phase midpoint controlled rectifier is shown in the figure. During positive half-cycle of ... some part of next positive half-cycle of voltage with reversed polarity can appear across load.
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213 views
1 answer
asked
Oct 13, 2019
by
anonymous

Single-phase Midpoint controlled rectifier with Resistive load
Last Answer : Single-phase Midpoint controlled rectifier with Resistive load: 1) During positive half cycle of AC supply, a is positive with respect to b , this makes T1 forward biased and T2 is reverse ... voltage reverses the polarity and T2 is turned off. The operation is as shown in waveforms.
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619 views
1 answer
asked
Oct 13, 2019
by
anonymous

When the firing angle a of a single-phase, fully controlled rectifier feeding constant direct current into a load is 30°, the displacement power factor of the rectifier is
Last Answer : When the firing angle a of a single-phase, fully controlled rectifier feeding constant direct current into a load is 30°, the displacement power factor of the rectifier is √3/2
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1.4k views
1 answer
asked
Apr 29, 2018
by
anonymous
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Last Answer : Rectifier is use in power supply to convert Alternating current (AC) to Direct Current (DC) .
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109 views
1 answer
asked
Sep 13, 2017
by
anonymous

Last Answer : Full wave bridge rectifier is used in mobile chqrger.
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182 views
2 answers
asked
Sep 13, 2017
by
anonymous

Last Answer : the efficiency of centre tapped full wave rectifier and bridge rectifier is same that is 80.2% but the because of the use of Central trap the Transformer utilisation factor It's become low.hence we can say the bridge rectifier is more efficient
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104 views
1 answer
asked
Sep 13, 2017
by
anonymous

Last Answer : rectifier is a device which converts AC voltage to pulsating DC voltage using one or more diode diode conducts only in unit direction that is forward bias condition practically it does not conduct ... types one is with using two diodes and Centre tap Transformer and another is bridge wave rectifier
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104 views
1 answer
asked
Sep 13, 2017
by
anonymous

Last Answer : Ac to dc
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125 views
1 answer
asked
Sep 13, 2017
by
anonymous

A three phase controlled rectifier
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3 views
0 answers
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List out advantages and disadvantages of bridge rectifier.
Last Answer : Advantages : 1. Bridge rectifier can be used in applications allowing floating output terminals i.e. not output terminal is grounded. 2. The need of center-tapped transformer is eliminated. ... The value of the diodes used should be precise , else there will be an error in rectification
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212 views
1 answer
asked
May 16, 2020
by
anonymous

Define PIV, TUF, ripple factor, efficiency of rectifier.
Last Answer : PIV: Peak Inverse Voltage (PIV) is defined as the maximum negative voltage which appears across non-conducting reverse biased diode. TUF : Transformer Utilization Factor (TUF) is defined as the ratio of DC output ... Efficiency of rectifier: η = DC output power/ AC input power = PLdc / Pac
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828 views
2 answers
asked
May 2, 2020
by
anonymous

need of rectifier and filter.
Last Answer : Need of rectifier: Every electronics circuit needs a D.C. power source for its operation. The rectifier circuit is used to convert A.C. supply to unidirectional pulses . Need of filter: A filter ... only the D.C. components to reach the load. So filter is used to provide ripple free output.
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60 views
1 answer
asked
Aug 19, 2019
by
anonymous

2.6k views
0 answers
asked
Jul 24, 2019
by
anonymous

Explain full wave bridged rectifier with the help of circuit diagram and input output waveform.
Last Answer : 1. In positive half cycle (0 to Π): The end A of the secondary winding becomes positive and end B negative. This makes diode D1 and D4 forward biased while diode D2 and D3 are reverse biased. These two diodes will ... D2 and D3 when it is conducting is as follows. B - D2 - RL - D3 - A
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167 views
1 answer
asked
Sep 5, 2018
by
anonymous

In a half-wave rectifier, if an a.c supply is 60 Hz. Then what is the a.c ripple at output? (A) 30 Hz (B) 60 Hz (C) 20 Hz (D) 15 Hz
Last Answer : In a half-wave rectifier, if an a.c supply is 60 Hz. Then what is the a.c ripple at output? (A) 30 Hz (B) 60 Hz (C) 20 Hz (D) 15 Hz
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394 views
1 answer
asked
Apr 26, 2018
by
anonymous

Last Answer : The rectifier instrument is not free from frequency error.
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189 views
1 answer
asked
Mar 21, 2018
by
anonymous

Last Answer : The scale of a rectifier instrument is linear.
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161 views
1 answer
asked
Mar 21, 2018
by
anonymous

Last Answer : Rectifier is a device which convert AC to DC.
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2.6k views
1 answer
asked
Sep 21, 2017
by
anonymous


Changeover from D.C to A.C
Last Answer : In later half of eighties, in nineteenth century, it was proposed to have a power system with 3- phase, 50 Hz A.C generation, transmission and distribution networks. Once a.c system was adopted, transmission of ... favor of A.C supply system own the debate on switching over from D.C to A.C system.
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2.4k views
1 answer
asked
Aug 8, 2019
by
anonymous

Describe the difference between direct and alternating current.
Last Answer : Direct current is the flow of electricity or charge in one direction.. Alternative current is the flow of charge that doesn't flow in one direction.
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5.3k views
4 answers
asked
Jun 29, 2019
by
anonymous

State any four advantages of A. C. over D. C .
Last Answer : Advantages of AC over DC: i) It is possible to use a transformer. ii) Distribution efficiency is high. iii) Generation is easy and economical. iv) Construction of ac equipment/ machines is robust and simple ... . vii) AC system is economical than DC system. viii) AC system is safer than DC system.
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124 views
1 answer
asked
Sep 4, 2018
by
anonymous
