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Do cell phones use AC or DC current?
Speak Question
asked
Mar 14, 2018
by
anonymous
Do cell phones use AC or DC current?
cell
phones
use
ac
dc
current
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2
Answers
Speak Answer
answered
Mar 14, 2018
by
anonymous
The cell phone has a battery inside it which caries DC. So cell phone uses DC.
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Speak Answer
answered
Aug 25, 2018
by
naigangliu6
DC of course.
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Related questions
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
views
3
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
views
2
answers
asked
Mar 10, 2018
by
anonymous
What is the use of AC and DC drives?
What is the use of AC and DC drives?
use
ac
dc
drives
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0
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73
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0
answers
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
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
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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4
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
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
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
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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0
answers
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 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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1
answer
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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63
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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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2
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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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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114
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1
answer
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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1
answer
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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1
answer
asked
Nov 22, 2019
by
anonymous
Alternating current (AC)
Alternating current (AC)
Last answer:
AC stands for Alternating Current meaning voltage or current that changes polarity or direction respectively over time. An Alternating Current (AC) is an electric current whose magnitude ... energy are known as alternators and are simpler construction than DC electromechanical generators.
alternating
current
ac
english
electrical
engineering
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2
answers
asked
Mar 14, 2018
by
anonymous
How does AC current change direction?
How does AC current change direction?
Last answer:
This is because the angle at which the magnetic fields cuts across a winding changes its poles thus current has to change dirention .
ac
current
change
direction
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1
answer
asked
Mar 14, 2018
by
anonymous
What is the direction of an AC current?
What is the direction of an AC current?
Last answer:
The magnitude and direction of alternating current is changes with respect to time. So for half cycle it is positive and for next half cycle it is negative.
direction
ac
current
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2
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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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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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124
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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
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
answers
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 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
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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2.9k
views
9
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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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117
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2
answers
asked
Mar 14, 2018
by
anonymous
Which way do electrons flow in an electrochemical cell?
Which way do electrons flow in an electrochemical cell?
electrons
flow
electrochemical
cell
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50
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0
answers
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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120
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1
answer
asked
Nov 22, 2019
by
anonymous
Direct Current (DC)
Direct Current (DC) Next Topic : Alternating current (AC)
Last answer:
Direct Current (DC) is the unidirectional electric current. Uni meaning is one. And the flow of charge in same direction. We know that conventional current flow from positive terminal of battery to ... The magnitude of DC may constant or vary but direction do not change with respect to time.
direct
current
dc
electrical
engineering
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199
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3
answers
asked
May 3, 2018
by
anonymous
A 200 V dc shunt motor is running at 1000 rpm and drawing a current of 10 A. Its armature winding resistance
A 200 V dc shunt motor is running at 1000 rpm and drawing a current of 10 A. Its armature winding resistance is 2 Ohm. It. is braked by plugging. The resistance to be connected in series with armature to restrict armature current to 10 A, is
Last answer:
A 200 V dc shunt motor is running at 1000 rpm and drawing a current of 10 A. Its armature winding resistance is 2 Ohm. It. is braked by plugging. The resistance to be connected in series with armature to restrict armature current to 10 A, is 36 Ohm
dc
shunt
motor
running
current
armature
winding
resistance
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0
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175
views
1
answer
asked
Apr 30, 2018
by
anonymous
The eddy current loss in a dc generator is 400 W at 40 Hz frequency of reversal and constant flux density.
The eddy current loss in a dc generator is 400 W at 40 Hz frequency of reversal and constant flux density. When frequency is increased to 50 Hz., eddy current loss is : (A) 256 W (B) 320 W (C) 500 W (D) 625 W
Last answer:
The eddy current loss in a dc generator is 400 W at 40 Hz frequency of reversal and constant flux density. When frequency is increased to 50 Hz., eddy current loss is : 625 W
eddy
current
loss
dc
generator
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78
views
1
answer
asked
Apr 29, 2018
by
anonymous
A 3 -phase, fully controlled, converter is feeding power into a DC load at a constant current of 150 A, the rms
A 3 -phase, fully controlled, converter is feeding power into a DC load at a constant current of 150 A, the rms value of the current flowing through each thyristor of the converter is
Last answer:
A 3 -phase, fully controlled, converter is feeding power into a DC load at a constant current of 150 A, the rms value of the current flowing through each thyristor of the converter is 150/√3
fully
controlled
converter
feeding
power
dc
load
constant
current
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179
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1
answer
asked
Mar 24, 2018
by
anonymous
The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of______degrees.
The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of______degrees.
Last answer:
The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of 45 degrees.
rms
sinusoidal
ac
current
value
angle
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490
views
1
answer
asked
Sep 2, 2019
by
anonymous
Photocell and solar cell difference?
Photocell and solar cell difference?
Last answer:
A photo cell is a light dependent resistor which decreases it resistance high intensity of light and is used to automatically control lights etc where as a solar cell solar or light energy into electrical energy.
photocell
solar
cell
difference
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61
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2
answers
asked
Aug 3, 2019
by
anonymous
Explain with neat diagram the working of photo-voltaic cell.
Explain with neat diagram the working of photo-voltaic cell.
Last answer:
Diagram the working of photo-voltaic cell: Working:- Solar cell operates on principle of Photo-voltaic effect Solar cell works in following steps: The solar cell is composed ... . When you connect loads such as a light bulb, electric current flows between the two electrodes.
diagram
working
photo-voltaic
cell
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135
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1
answer
asked
Aug 2, 2019
by
anonymous
Explain the characteristics of solar cell.
Explain the characteristics of solar cell.
Last answer:
Characteristics of solar cell : Explanation :- Solar cells produce direct current ( DC ) electricity and current times voltage equals power, so we can create solar cell I-V curves representing ... system so that it can operate as close to its optimal peak power point (MPP) as possible.
characteristics
solar
cell
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85
views
1
answer
asked
Sep 7, 2018
by
anonymous
State the principle of solar cell. What is necessity of series and parallel connection of solar cells.
State the principle of solar cell. What is necessity of series and parallel connection of solar cells.
Last answer:
Principle of solar cell:- Working:- Solar cell operates on principle of Photo-voltaic effect Solar cell works in following steps: The solar cell is composed of a P-type ... of Voltage & Current rating it is necessity of connecting series and parallel connection of solar cells.
solar
cell
series
parallel
connection
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66
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1
answer
asked
May 8, 2018
by
anonymous
In fuel cell the __________ energy is converted into electrical energy.
In fuel cell the __________ energy is converted into electrical energy. (A) Mechanical (B) Chemical (C) Heat (D) Sound
Last answer:
In fuel cell the Chemical energy is converted into electrical energy.
fuel
cell
electrical
energy
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99
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1
answer
asked
Mar 21, 2018
by
anonymous
E.m.f. of a Weston cell is accurately measured by?
Last answer:
E.m.f. of a Weston cell is accurately measured by electrostatic voltmeter.
emf
weston
cell
accurately
measured
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152
views
1
answer
asked
Mar 15, 2018
by
anonymous
How do you use a Megger tester?
How do you use a Megger tester?
use
megger
tester
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49
views
0
answers
asked
Mar 20, 2018
by
anonymous
In a D.C. shunt motor, under the conditions of maximum power, the current in the armature will be?
Last answer:
In a D.C. shunt motor, under the conditions of maximum power, the current in the armature will be more than full-load current.
dc
shunt
motor
conditions
maximum
power
current
armature
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like
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175
views
1
answer
asked
Mar 15, 2018
by
anonymous
How do I use Arduino?
How do I use Arduino?
use
arduino
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53
views
0
answers
asked
Mar 11, 2018
by
anonymous
Why do we use Gauss elimination method?
Why do we use Gauss elimination method?
use
gauss
elimination
method
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82
views
0
answers
asked
Mar 11, 2018
by
anonymous
Why do we use VLSI?
Why do we use VLSI?
Last answer:
VLSI is Very Large Scale Integration. VLSI is very useful for compact design. More functionalities in smaller size. VLSI IC have small power consumption as compared to discrete components circuit. VLSI can be use for different functions in compact size.
use
vlsi
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132
views
1
answer
asked
Mar 10, 2018
by
anonymous
What do we use to generate electricity?
What do we use to generate electricity?
Last answer:
Use wind turbines. In a windy seashore we set up some wind turbines. But when the place is not windy we got no electricity.
use
generate
electricity
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153
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2
answers
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