what is alternating current & direct current quora
0c69e8708bcdc95669a71a2aa2aae492
Alternating Current (AC) vs. Direct Current (DC) Why, Alternating Current and Direct Current, of course! Both AC and DC describe types of current flow in a circuit. In direct current (DC), the electric charge (current) only flows in one direction. Electric charge in alternating current (AC), on the other hand, changes direction periodically. The voltage in AC circuits also periodically reverses because the current changes direction.
0775028450e893bf8c09ea9573734ac5
Electric current AC is the form in which electric power is delivered to businesses and residences. The usual waveform of alternating current in most electric power circuits is a sine wave. In certain applications, different waveforms are used, such as triangular or square waves.
1149d4346f95f6aa325dde817e84e3e7
- Edison's direct-current (DC) system of electricity was challenged by Tesla and George Westinghouse's alternating-current (AC) system, and for several years these men and their companies were fierce competitors.
2bceead6413855f2b4275bf5169811b3
Alternating-Current Generator See Direct-current generator, Electric power systems, Transformer. Most ac generators are synchronous machines, that is, the rotor is driven at a speed that is exactly related to the rated frequency of the ac network.
6fca7f0de94f57011b540a874efbc1da
What is the difference between AC and DC currents? Also see current, voltage, and direct current. In electricity, alternating current (AC) occurs when charge carriers in a conductor or semiconductor periodically reverse their direction of movement. Household utility current in most countries is AC with a frequency of 60 hertz (60 complete cycles per second), although in some countries it is 50 Hz.
47e02707e7b035dcfc63750fac0c7867
What Does AC & DC Stand For? Batteries and many power supplies produce DC, while the electricity in your wall outlets is AC. The terms AC and DC refer to the type of electric current used by a device. Batteries and many power supplies produce DC, while the electricity in your wall outlets is AC. credit: Jupiterimages/Polka Dot/Getty Images. AC is the current in your wall.
2f2a298e52e9fb998ba56b8fd94c23ad
- Alternating current - Mathematics of AC voltages. 1  Alternating currents are accompanied (or caused) by alternating voltages. 2  V p e a k {\displaystyle \displaystyle V_ {\rm {peak}}} is the peak voltage (unit: volt), 3  ω {\displaystyle \displaystyle \omega } is the angular frequency (unit: radians per second)
338e43e6b4a79f94dbedb6248487ff9b
- DC vs AC Motors. DC or direct current motors work in particular situations whereby the speed of the motor needs to be externally controlled. On the other hand AC or alternating current electric motors are used in a completely different process drawing upon the kind of ac motor being used.
156a762024a997f2bb08c9bc0475768c
What is the difference between AC and DC currents? Audio and radio signals carried on electrical wires are also examples of alternating current. These types of alternating current carry information encoded (or modulated) onto the AC signal, such as sound (audio) or images (video).
60577b12115cd12e8be6855bb4d265ca
SMAW BasicsâHow much do you know? This makes an erratic flow for SMAW, producing more spatter and a more unstable current. I used AC for welding 6011 for a couple of years. The welds were OK, but give me DC anytime. 3. Direct current electrode positive (DCEP) is what we used to call reverse polarity. Direct current electrode negative (DCEN) is what we used to call straight polarity. I suspect the same person who changed the word library to the learning resource center got a hold of these terms. In DCEP the electricity flows into the tip of the welding rod and concentrates about two-thirds of the heat, which gives good penetration.
e34d466449e7e27732df2bc432efab2b
A-level Physics (Advancing Physics)/Generators Simple AC Generator [edit]. An alternative method of generating an alternating current is to rotate a permanent magnet in a gap between two coils. This has the advantage of not requiring a commutator (the coil is the stator), but often a coil is lighter than a magnet, and so it is more efficient to use a rotating coil.
6128e9582bc8182d08d77ac326c29bdf
- AC, or alternating current means the electrical current is alternating directions in a repetitive pattern. 1  AC is created by generators in power plants, and other sources. This AC current is delivered to our homes and businesses by the power lines we see everywhere. 2  The frequency of repetition of this current is 60 Hertz.
5563032f57dee885425a1b69dfaf654f
voltage An example of direct voltage is the potential difference between the terminals of an electrochemical cell. Alternating voltage exists between the terminals of a common utility outlet. A voltage produces an electrostatic field, even if no charge carriers move (that is, no current flows).
d9e4a13a372431d6e42054d919e6f56f
Direct Current Direct current (DC) is the unidirectional flow of electric charge. Direct current is produced by such sources as batteries, thermocouples, solar cells, and commutator-type electric machines of the dynamo type. Direct current may flow in a conductor such as a wire, but can also be through semiconductors, insulators, or even through a vacuum as in electron or ion beams. The electric charge flows in a constant direction, distinguishing it from alternating current (AC).
14cca08473df0cdb5651ef96725acf75
What is direct current? A direct current circuit is an electrical circuit that consists of any combination of constant voltage sources, constant current sources, and resistors. In this case, the circuit voltages and currents are independent of time.
d3b3498cb8e30d4d68c10ff41f75b8a6
Ask An Engineer One looks like a straight line, the other a wave; together, they power your laptop…. Alternating current (AC) and direct current (DC) are notable for inspiring the name of an iconic metal band, but they also happen to sit right at the center of the modern world as we know it. AC and DC are different types of voltage or current used for the conduction and transmission of electrical energy.
351c119f6070f1988f68b339956f9073
Electric current Electric current in a wire, where the charge carriers are electrons, is a measure of the quantity of charge passing any point of the wire per unit of time. In alternating current (q.v.) the motion of the electric charges is periodically reversed; in direct current (q.v.) it is not. In many contexts the direction of the current in electric circuits is taken as the direction of positive charge flow, the direction opposite to the actual electron drift.
cb08fb32202bdb32dced54c2cde20130
- 1 AC, or alternating current means the electrical current is alternating directions in a repetitive pattern. 2  AC is created by generators in power plants, and other sources. 3  This AC current is delivered to our homes and businesses by the power lines we see everywhere.
b3524673c944e36a9af898d021d4c117
Alternating current Alternating current (green curve). The horizontal axis measures time; the vertical, current or voltage. Alternating current (AC), is an electric current which periodically reverses direction, whereas direct current (DC, also dc) flows only in one direction.
31a80813f171c20519e126764b8a5d47
Direct Current Direct current is used to charge batteries, and in nearly all electronic systems, as the power supply. Very large quantities of direct-current power are used in production of aluminum and other electrochemical processes. Direct current is used for some railway propulsion, especially in urban areas.
d2c876cc2f3bd45fd4ae1ea9713f07d4
Tesla and Edison - War of the Currents Tesla and Edison - War of the Currents. In the late 19th century, three brilliant inventors, Thomas Edison, Nikola Tesla and George Westinghouse, battled over which electricity system - direct current (DC) or alternating current (AC) - would become standard.
c624774a18db3f181a60108b6ac00c32
Direct Current Direct current is used to charge batteries, and in nearly all electronic systems as the power supply. Very large quantities of direct-current power are used in production of aluminum and other electrochemical processes. Direct current is used for some railway propulsion, especially in urban areas.
73da936e20884b22f88cdd12ff100ea7
- Alternating current is a versatile type of power ? It can be easily changed to the voltage or current needs of particular circuits Direct current (DC) is also useful for?
41870c7426f1994564e02ddb877c170f
What Does AC and DC Mean in Electricity? Quick Answer. When talking about electrical current, AC stands for alternating current and DC stands for direct current.. Alternating current is the type of current that comes from a power plant and outlet, in which the current changes directions rapidly. Direct current is the type of current that comes from a battery, where the current is always flowing in the same direction.
335d6ea6af7e204af6e37d8b1a680cd7
Difference Between DC and AC Motors Difference Between DC and AC Motors. DC or direct current motors work in particular situations whereby the speed of the motor needs to be externally controlled. On the other hand AC or alternating current electric motors are used in a completely different process drawing upon the kind of ac motor being used.
2a099089bf37814bfc8dd9e83f70b652
Power System AC is when the electrons flow in two directions, from the positive to the negative terminal and from the negative to the positive terminal, 'alternating' between the two directions. A lot of people think of electron flow as electrons moving along a wire freely like cars go down a highway.