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What is the use of AC and DC drives?
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asked
Mar 10, 2018
by
anonymous
What is the use of AC and DC drives?
use
ac
dc
drives
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asked
Mar 14, 2018
by
anonymous
Do cell phones use AC or DC current?
Do cell phones use AC or DC current?
Last answer:
DC of course.
cell
phones
use
ac
dc
current
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179
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2
answers
asked
Mar 10, 2018
by
anonymous
What is the difference between AC and DC drive?
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
difference
between
ac
dc
drive
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132
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1
answer
asked
Mar 15, 2018
by
anonymous
What is the difference between an AC and DC generator?
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.
difference
between
ac
dc
generator
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284
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1
answer
asked
Mar 11, 2018
by
anonymous
Why do we use AC current in our homes?
Why do we use AC current in our homes?
Last answer:
We used it for cooking rice, For washing clothes and for lights in the house.
use
ac
current
homes
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174
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3
answers
asked
Apr 26, 2020
by
anonymous
What is the advantage of AC over DC electrical transmission?
What is the advantage of AC over DC electrical transmission?
advantage
ac
over
dc
electrical
transmission
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63
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answers
asked
Aug 15, 2019
by
anonymous
What is the conversion between. AC to AC ? DC to DC? AC to DC? DC to AC ?
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
dc
ac
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1
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asked
Aug 28, 2019
by
anonymous
Which is more dangerous AC or DC and why ?
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
dangerous
ac
dc
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115
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2
answers
asked
Apr 29, 2018
by
anonymous
Which of the following motors can run on both AC and DC?
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
motors
ac
dc
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113
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1
answer
asked
May 3, 2020
by
anonymous
Compare the AC and DC Arc lamps.
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
compare
the
ac
and
dc
arc
lamps
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122
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1
answer
asked
Sep 3, 2019
by
anonymous
Why are DC motors used in trains and not AC motors ?
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.
dc
motors
trains
ac
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138
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1
answer
asked
Aug 8, 2018
by
anonymous
Distinguish between AC and DC.
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.
difference
between
ac
dc
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416
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2
answers
asked
Oct 18, 2017
by
anonymous
are AC and DC resistances same?
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
ac
dc
resistances
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60
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1
answer
asked
Nov 11, 2019
by
Rithikraj R
Csi fed ac drives
drives
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43
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0
answers
asked
May 8, 2018
by
anonymous
The main advantage of AC over DC is:
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 .
main
advantage
ac
over
dc
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111
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2
answers
asked
Jun 29, 2019
by
anonymous
Is the power line voltage available in our homes a dc or an ac voltage?
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.
is
the
power
line
voltage
available
in
our
homes
a
dc
or
an
ac
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5.0k
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1
answer
asked
Mar 10, 2018
by
anonymous
Is it AC or DC electricity in the home?
Is it AC or DC electricity in the home?
Last answer:
Obviously its A.C
ac
dc
electricity
home
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160
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4
answers
asked
Aug 28, 2019
by
anonymous
Why is AC considered more efficient than DC?
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.
ac
considered
efficient
dc
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83
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1
answer
asked
Aug 11, 2018
by
nbattack
is it DC better than AC to transmit? explain it.
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
ac
dc
electricity
hvdc
facts
powersystems
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447
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2
answers
asked
Mar 19, 2018
by
anonymous
How is a thyristor used to convert AC to DC?
How is a thyristor used to convert AC to DC?
thyristor
used
convert
ac
dc
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0
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96
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0
answers
asked
Mar 14, 2018
by
anonymous
Is current from a battery AC or DC?
Is current from a battery AC or DC?
Last answer:
The current from the battery is DC
current
battery
ac
dc
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104
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2
answers
asked
Mar 10, 2018
by
anonymous
Is electricity generated in AC or DC?
Is electricity generated in AC or DC?
Last answer:
Electricity is generated in AC.
electricity
generated
ac
dc
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101
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1
answer
asked
Sep 9, 2017
by
anonymous
is induction motor ac or dc?
Last answer:
Induction motor is a AC motor it is also known as asynchronous motor .
induction
motor
dc
ac
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73
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1
answer
asked
May 7, 2020
by
anonymous
State the modification to be done in dc series motor to work satisfactorily as ac series motor. State applications of ac series motor.
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
state
the
modification
to
be
done
in
dc
series
motor
work
satisfactorily
as
ac
applications
of
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79
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1
answer
asked
Jul 25, 2019
by
anonymous
How to convert 12v dc to 12v ac
convert
ac
dc
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2.6k
views
0
answers
asked
Feb 24, 2018
by
Amit Sharma
How IGBT convert DC into AC in solar inverter?
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.
ac
dc
convert
transformer
solar
inverter
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162
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1
answer
asked
Dec 9, 2017
by
anonymous
Can transformer convert AC to DC?
Can transformer convert AC to DC?
Last answer:
No, Transformer cannot convert AC to DC.
transformer
convert
ac
dc
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4
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1
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2.9k
views
9
answers
asked
Sep 13, 2017
by
anonymous
can rectifier convert dc to ac?
Last answer:
NO IT ONLY CONVERT FROM AC TO DC BECAUSE DIODE WHICH ARE USED IN IT, ARE UNIDIRECTIONAL.
dc
rectifier
ac
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126
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2
answers
asked
Sep 13, 2017
by
anonymous
how does rectifier convert ac to dc?
Last answer:
IT CHANGES NEGATIVE CYCLE IN TO POSITIVE CYCLE FROM AC CURRENT.
rectifier
ac
dc
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0
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117
views
2
answers
asked
Dec 16, 2017
by
anonymous
What is the use of an electric motor?
What is the use of an electric motor?
Last answer:
Electrical motors are use for converting electrical energy to mechanical energy. It may be use in fans, pumps, washing machine, cranes, trains, factories, industries etc.
use
electric
motor
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0
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72
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1
answer
asked
Mar 21, 2018
by
anonymous
The stator of phase shifting transformer for use in conjunction with an A.C. potentiometer usually has a?
Last answer:
The stator of phase shifting transformer for use in conjunction with an A.C. potentiometer usually has a two-phase winding.
stator
phase
shifting
transformer
use
conjunction
ac
potentiometer
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0
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120
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1
answer
asked
Jul 30, 2019
by
anonymous
What are the factors to be considered while selection of motors for different drives?
What are the factors to be considered while selection of motors for different drives?
Last answer:
Following Factors are considered while selecting electric drive (Motor) for particular application: Factors to be considered for selection of Electrical Drives: 1) Nature of Supply:- Whether supply ... , load equalization 7) Cost: - Capital, Running and maintenance cost should be less.
motors
different
drives
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0
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66
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1
answer
asked
Mar 10, 2018
by
anonymous
Explain different gate drives techniques with base circuits and key features.
Explain different gate drives techniques with base circuits and key features.
different
gate
drives
techniques
base
circuits
key
features
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541
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0
answers
asked
Aug 17, 2019
by
anonymous
With proper reason suggest type of enclosure for electric drives used in coal mines.
With proper reason suggest type of enclosure for electric drives used in coal mines.
Last answer:
Flame-proof type of enclosure for electric drives is used in coal mines. Reason: - Coal mines are very hazardous, prone to flame and explosions. Under such conditions, flame proof type ... them (due to arcs, sparks, or flashes) without igniting the surrounding flammable gases or vapors.
electric
drives
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0
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35
views
1
answer
asked
Aug 17, 2019
by
anonymous
State types of enclosures of electric drives.
State types of enclosures of electric drives.
Last answer:
Types of enclosures of Electric Drives: 1) Screen protected 2) Open type 3) Protected type 4) Totally enclosed 5) Drip-proof type 6) Pipe ventilated type 7) Flame proof type 8) Explosion proof 9) Splash proof.
electric
drives
enclosures
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0
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27
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1
answer
asked
Jun 22, 2018
by
Erdemuysal
What are the advantages of the use of frequency converter instead of star-delta or soft starter?
Can you guys explain the advantages of frequency converter against the star delta or soft starter?
Last answer:
¬Soft starters A soft starter is, as you would expect, a device which ensures a soft starting of a motor. A softstarter has different characteristics to the other starting ... at rated current from zero to full speed. Frequency converters are becoming cheaper all the time.
electrical
machines
drives
asynchronous
induction
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0
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354
views
1
answer
asked
Mar 25, 2018
by
anonymous
All the rules and laws of D.C. circuit also apply to A.C. circuit containing?
All the rules and laws of D.C. circuit also apply to A.C. circuit containing?
Last answer:
All the rules and laws of D.C. circuit also apply to A.C. circuit containing resistance only.
rules
laws
dc
circuit
ac
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0
like
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0
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149
views
1
answer
asked
Jun 29, 2019
by
anonymous
Describe the difference between direct and alternating current.
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.
ac
dc
difference
between
direct
alternating
current
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5.1k
views
4
answers
asked
Mar 20, 2018
by
anonymous
If a D.C. motor is connected across the A.C. supply it will?
Last answer:
If a D.C. motor is connected across the A.C. supply it will burn due to heat produced in the field winding by eddy currents.
dc
motor
connected
ac
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75
views
1
answer
asked
Apr 29, 2018
by
anonymous
An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic
An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic field having a component along the axis will be (1) unaffected (2) decreased (3) increased (4) either decreased or increased depending on the direction of the DC field
Last answer:
An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic field having a component along the axis will be either decreased or increased depending on the direction of the DC field
unshielded
moving
iron
voltmeter
used
measure
voltage
ac
circuit
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0
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263
views
1
answer
asked
Mar 20, 2018
by
anonymous
If a D.C. series motor is operated on A.C. supply, it will?
Last answer:
If a D.C. series motor is operated on A.C. supply, it will spark excessively, have poor efficiency, have poor power factor.
dc
series
motor
operated
ac
supply
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0
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63
views
1
answer
asked
Aug 25, 2019
by
anonymous
Why is AC better for long distance power transmission than DC ?
Why is AC better for long distance power transmission than DC ?
Last answer:
ac is more economical to transmit for long distances . wires can be made smaller by step up transformer .. since major cost are wires to transmit .. then at the end of distance step down transformer is used for commercial use.
ac
long
distance
power
transmission
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166
views
4
answers
asked
Sep 4, 2018
by
anonymous
State any four advantages of A. C. over D. C .
State any four advantages of A. C. over D. C .
Last answer:
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advantages
ac
dc
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90
views
2
answers
asked
Aug 19, 2019
by
anonymous
Why can't we store AC in batteries instead of DC ?
Why can't we store AC in batteries instead of DC ?
Last answer:
Because the direction of the current changes in AC electricity, you cannot directly store the power. Placing a capacitor in an AC circuit has no effect on the alternating flow of the electricity. The only ... is indirectly, by storing DC and then using a power inverter to convert the DC to AC.
batteries
store
ac
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96
views
3
answers
asked
Aug 8, 2019
by
anonymous
Changeover from D.C to A.C
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.
changeover
dc
ac
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2.4k
views
1
answer
asked
Mar 20, 2018
by
anonymous
A.C. series motor as compared to D.C. series motor has?
Last answer:
A.C. series motor as compared to D.C. series motor has smaller brush width, less number of field turns, more number of armature turns, less air gap.
ac
series
motor
compared
dc
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0
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0
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69
views
1
answer
asked
Aug 18, 2019
by
anonymous
What would happen if a DC motor was supplied with AC ?
What would happen if a DC motor was supplied with AC ?
Last answer:
With three phase induction motor, humming and not rotate, but if single phase universal motor like air blower, home mixture, motor run on constant speed..speed variation not possible...
dc
motor
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91
views
2
answers
asked
May 15, 2020
by
anonymous
What is the use of transformer?
What is the use of transformer?
Last answer:
The use of transformer is to do lower or raise the voltage or currents in an electrical circuit. That's quite so simple.
use
transformer
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1
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0
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139
views
1
answer
asked
Mar 22, 2018
by
anonymous
What is the use of diode in the circuit?
What is the use of diode in the circuit?
Last answer:
Diode is a device which allows the flow of current in one direction and blocks the current in opposite direction.
use
diode
circuit
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0
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0
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99
views
1
answer
asked
Mar 19, 2018
by
anonymous
What is the use of a thyristor in a circuit?
What is the use of a thyristor in a circuit?
use
thyristor
circuit
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0
like
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0
dislike
2.8k
views
0
answers
asked
Mar 19, 2018
by
anonymous
What is the use of a Mosfet?
What is the use of a Mosfet?
use
mosfet
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0
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0
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44
views
0
answers
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