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Topic: Current (electricity)


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  Electric current - Wikipedia, the free encyclopedia
Electric currents in electrolytes are flows of electrically charged atoms (ions), which exist in both positive and negative varieties.
The SI unit of electric current is the ampere (A), which is equal to a flow of one coulomb of charge per second.
It is the current that passes that determines the effect, and this depends on the nature of the contact, the condition of the body part, the current path through the body and the voltage of the source.
en.wikipedia.org /wiki/Current_(electricity)   (1321 words)

  
 Electricity - Wikipedia, the free encyclopedia
Electricity is responsible for many well-known physical phenomena such as lightning, electric fields and electric currents, and is put to use in industrial applications such as electronics and electric power.
Electric charge is a property of certain subatomic particles (e.g., electrons and protons) which interacts with electromagnetic fields and causes attractive and repulsive forces between them.
An electric current is a flow of electric charge, and its intensity is measured in amperes.
en.wikipedia.org /wiki/Electricity   (1993 words)

  
 Current (electricity)   (Site not responding. Last check: 2007-10-31)
In electronics, electric current is most often the flow of electrons through conductors and devices such as resistors, but it is also the flow of ions inside a battery or the flow of holes within a semiconductor.
Electric currents in electrolytes are flows of electrically charged atoms (ions), which exist in both positive and negative varieties.
This is the case in a p-type semiconductor.The SI unit of electrical current is the ampere.
www.abcworld.net /Current_%28electricity%29.html   (1071 words)

  
 Current (electricity)   (Site not responding. Last check: 2007-10-31)
In electricity, current refers to electric current, which is the flow of electric charge.
The symbol typically used for the amount of current (the amount of charge flowing per unit of time) is I, from the German word Intensität, which means 'intensity'.
Electric current is therefore sometimes informally referred to as amperage, by analogy with the term voltage.
www.guideofpills.com /Current_%28electricity%29.html   (1225 words)

  
 Glossary
The electrical current is simply a measure of how much electricity passes a given point in a fixed amount of time.
Electrical resistance is a measure of how hard it is for a current to pass through a given material.
The other form of electrical phenomena is current electricity, where the charges are moving in a large-scale, organized way.
www.mos.org /sln/toe/glossary.html   (742 words)

  
 Read about Current (electricity) at WorldVillage Encyclopedia. Research Current (electricity) and learn about Current ...   (Site not responding. Last check: 2007-10-31)
The SI unit of electrical current is the ampere.
Electric current is therefore sometimes informally referred to as amperage, by analogy with the term
As most dangerous sources are voltage sources, the current present depends on the resistance of the body between the points of contact and any current limiting built into the source.
encyclopedia.worldvillage.com /s/b/Current_(electricity)   (584 words)

  
 Current (electricity) - Hutchinson encyclopedia article about Current (electricity)
Direction in which an electric current is considered to flow in a circuit.
In the 19th century, with the early applications of electricity such as starter motors and light bulbs, there was not an exact understanding of the nature of current flow.
It was assumed at the time that electricity flowed from the positive terminal to the negative.
encyclopedia.farlex.com /Current+(electricity)   (176 words)

  
 "Electricity" Misconceptions Spread By K-6 Textbooks
Electric current in a wire is not a flow of energy, it is a flow of matter.
During electric currents in batteries, in salt water, or in human flesh, the electric current is a flow of both positive and negative ions moving in opposite directions.
All the electric currents in your brain and nerves are composed of moving sodium and potassium atoms.
amasci.com /miscon/eleca.html   (12698 words)

  
 BBC - Schools - KS3 Bitesize - Science - Physics - Electricity 1   (Site not responding. Last check: 2007-10-31)
Electric current is a flow of electrons along a conductor like a metal wire.
Electric current is not used up because electrons are not destroyed.
The current is measured in amps (A) using an ammeter.
www.bbc.co.uk /schools/ks3bitesize/science/physics/electromag1_2.shtml   (98 words)

  
 Direct Current (DC) Electricity - Succeed in Physical Science
Direct current or DC electricity is the continuous movement of electrons from an area of negative (-) charges to an area of positive (+) charges through a conducting material such as a metal wire.
Whereas static electricity sparks consist of the sudden movement of electrons from a negative to positive surface, DC electricity is the continuous movement of the electrons through a wire.
Direct current or DC electricity is the continuous movement of electrons from negative to positive through a conducting material such as a metal wire.
www.school-for-champions.com /science/dc.htm   (1263 words)

  
 WebQuest
Current electricity is electricity that flows through a substance that conducts electricity such as copper wire.
Static electricity is electricity that is "at rest" and doesn't move like current electricity.
In a series circuit, electricity has only one path to travel from one point on the circuit through the wires, batteries, and bulbs and back to the starting point.
coe.west.asu.edu /students/jcorral/webquest.htm   (316 words)

  
 ActewAGL | Education site | Electricity | The basics of electricity   (Site not responding. Last check: 2007-10-31)
There is another type of electricity, current electricity, which consists of a continuous flow of electrons.
Current electricity flows because there is a difference in electrical pressure or potential between two points along a conductor.
In a direct current, the stream of electrons flow in only one direction around the circuit, from the negative terminal to the positive terminal (see diagram 5).
www.actewagl.com.au /education/electricity/basics   (669 words)

  
 Physics Help - Current Electricity
Current is the amount of charge, measured in coulombs, that passes a point, divided by the time.
Electrical power is really the same old power we all got to know and love in the Work and Energy lesson.
Since current is the amount of charge that passes a given point per time, all the currents have to be the same.
www.fortunecity.com /greenfield/eagles/180/current.html   (2052 words)

  
 Current Electricity Basics - Science Articles :: Physics Post
The second requirement for current flow is the presence of something to receive the energy given off by the charge carriers as they go between the charged regions.
The chemical reaction in the electrolyte of a dry cell, the phtovoltaic reaction of metals to sunlight, the electromotive force on charges in a moving magnetic field are the most common.
The third requirement for current flow is this complete path, called a circuit, which allows the charge carriers to go from one region of charge, through the load to the other region of charge.
www.physicspost.com /articles.php?articleId=157   (1035 words)

  
 SCIENCE HOBBYIST: Electricity F.A.Q. ANSWERS
When a generator sends electrical energy to your home, the energy travels as EM fields near the wires, and the flowing energy is solidly coupled to the electrons and protons in the metal wires.
Electrical energy that was in the space near your hand is flowing inwards towards the spark.
A huge electric current appears in the spark, and temperatures in the air (and in the dead skin surrounding your salty conductive flesh) rise to immense values.
www.amasci.com /elect/elefaq1.html   (12874 words)

  
 Alternating Current (AC) Electricity - Succeed in Physical Science
Alternating current or AC electricity is the type of electricity commonly used in homes and businesses throughout the world.
While the flow of electrons through a wire in direct current (DC) electricity is continuous in one direction, the current in AC electricity alternates in direction.
Thus the electricity in the wire moves in one direction for a while and then reverses its direction when the generator armature is in a different position.
www.school-for-champions.com /science/ac.htm   (1044 words)

  
 Dialogue for Kids - Electricity   (Site not responding. Last check: 2007-10-31)
A load is the part operated by the electricity, such as a light bulb or a TV.
Watch this neat movie which demonstrates how an electric circuit is arranged and which also explores good conductors.
The current in your house is alternating current.
www.idahoptv.org /dialogue4kids/season3/electricity/facts.html   (733 words)

  
 Current (electricity)   (Site not responding. Last check: 2007-10-31)
Tom Cruise and producing partner Paula Wagner have been put in charge of United Artists, a film studio that was formed by Hollywood...
Find Current (Electricity) and more at Lycos Search.
Watch videos, find deals and read articles about current (electricity).
www.alloffinance.com /Current_%28electricity%29.html   (1618 words)

  
 WHAT IS STATIC ELECTRICITY? WHAT IS CURRENT ELECTRICITY?
Electric charge is a kind of material substance, but it is not atoms.
The words "static electricity" are often used to mean "uncancelled electric charge." Therefore, when we claim to be "generating static electricity", what we're REALLY doing is grabbing the positive and negative bits of matter, then pulling them away from each other.
Now you know what an electric current really is. It's that simple: an electric current appears whenever the negative charges in an object are forced to flow through the positive charges, or when positive charges are forced to flow through negative ones.
www.eskimo.com /~billb/miscon/curstat2.html   (1061 words)

  
 Electricity Map: Voltage vs. current
Electric field corresponds to voltage, and magnetic field corresponds to current.
Therefore it's possible to place "static electricity" and "current electricity" upon different regions of a single map.
There is no such thing as "current water," and there is no such thing as "current electricity." If something is flowing inside of wires...
www.eskimo.com /~billb/miscon/ele-map.html   (451 words)

  
 Electricity and Tennis Balls
To Demonstrate the basic concepts of DC electricity using tennis balls.
The electric current is simply how many electrons pass by each second (though we actually count groups of electrons, since they are so small and there are so many of them!) Clearly, if we send twice as many identical electrons each second we are sending twice the energy.
In electrical talk we would say that power is the product of the current and the voltage.
www.mos.org /sln/toe/tennisballs.html   (816 words)

  
 Current Electricity
Produces and identifies examples of static and current electricity such as static cling and complete circuits.
Describes electrical sources to include chemical (battery), mechanical (generator) and light (photoelectric cell).
(Students should be familair with both in order to complete this activity.) Remind them that static electricity builds up on the surface of an object and current electricity flows through a circuit.
www.glc.k12.ga.us /builderv03/lptools/lpshared/lpdisplay.asp?LPID=1858   (964 words)

  
 Current (electricity) Encyclopedia Article @ HotAndCold.com   (Site not responding. Last check: 2007-10-31)
Electric current is the flow of electric charge.
Find More Information about "Current (electricity)" in HotAndCold.com's:
"Current (electricity)" results in these other popular encyclopedia sites:
www.hotandcold.com /encyclopedia/Current_(electricity)   (1334 words)

  
 Power meters, sub meters & panel meters for kWh & watt hours - ElectricityMetering.com
To date, we have not had a single complaint to the bureau of any type.
Click on the logo below to check on our current standing.
For online orders, we use the latest 128-bit encryption to protect and secure all personal and transaction information sent from you to us.
www.electricitymetering.com   (750 words)

  
 Video Librarian: Current Electricity@ HighBeam Research   (Site not responding. Last check: 2007-10-31)
One of four titles in Visual Learning Company's Electricity and Magnetism series, Current Electricity teaches viewers about how electrical current is generated, the path electricity takes to reach our homes, and the ways we use electricity.
Concepts and vocabulary covered include: sources of electric energy,...
This material is published under license from the publisher through ProQuest Information and Learning Company, Ann Arbor, Michigan.
www.highbeam.com /library/doc0.asp?DOCID=1P1:99818369&refid=holomed_1   (142 words)

  
 Compare all UK current accounts on uSwitch.com and apply online
Compare all UK current accounts on uSwitch.com and apply online
Take the quick route to our top deals...
Everything you need to know about current accounts
www.uswitch.com /CurrentAccounts   (54 words)

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