what is the definsion of electric current?
337456
Electrical Current is is the amount of charge moving per unit of time.  So charge is measured in coulombs and time in seconds.  Current is measured in Coulombs per second or Amps. 1 Coulomb/s = 1 Ampere.  Why do I still remember this junk....
739568
Three  terms you need to know are:\n\nVoltage- This is the "potential" to make current flow through \n                a wire.  (measured in volts)\nCurrent- This is the actual electrons or "electricity"  which \n               "flows" through the wire. (measured in amperes or amps)\nResistance- This is the quality of a substance which tends to \n                      allow or inhibit the flow of electricity.\n\nOne more term is power. This is measured in Watts and is \n given as 1 Watt=(1 volt)(1 amp)\n\nHere's how it works.  You put a voltage across a wire.\nYou decide the voltage.  It does not change.  The wire and bulb has "resistance" and only lets a certain amount or current flow.  The current flows through the bulb and lights the bulb.\n So both 100 watt bulbs and 40 watt bulbs have the same \n120v "voltage".  The difference  is that less current flows through the 40 watt bulb, so it is dimmer.\nRemember that power or "Watts" is current  times voltage.\nso lower wattage means lower current.\nThe question should be how much current does each bulb use.\nThe answer is: 100 watt-5/6 amp\n60 watt- 1/2 amp\n40 watt- 1/3 amp
639695
Electricity is essentially  a flow of charges which is driven by the electric field.\nso u cant expect to have a cup full of charges(electricity)\nSo dont get out in a thunderstorm with a bowl in ur hand to catch some electricity!!!
269565
The electric potential is the potential energy per unit charge, so \n\nV = PE/q\n\nAlthough strictly speaking, the above should be written as the change in electric potential = change in potential energy/charge.  That's because there is no absolute electric potential, or potential energy.  It depends on what your reference is.\n\nNow, from that definition a number of equations arise.  It depends on the context of your problem.  If you have an electric field, and you are moving a charge through it, your change in potential is given by\n\nV = E d \n\nThe above equation follows from the definition of electric field as the electric force/unit charge, and the equations for Work = Force x distance.\n\nIf you have a circuit that obeys Ohm's law, then\n\nV = I R where I is the current in the circuit and R is the resistance.
912115
current that flows in one direction as opposed to alternating current, which flows back and frth.
231801
The first 5 leters of the word electricity come from the word 'electron'. In the study of electricity (or electical engineering if you like), 2 quantities help us understand how elecricity works, they are;\n1.Current which is defined as the rate of flow of charge,i.e. how fast charges movein a medium, you see electrons are (negatively) charged particles, when a couple of electons move(say in a wire) current is said to flow, based on how well electrons will flow in a material all materials are classified under cconductors(like metals) and insulators(like wood).Conductors have higer 'conductivities'than wood. this is important to note because based on the molecular structures of materials electrons dont always flow as freely as they would like, the atoms in the material(based on the ambient temperature) offer opposition to the flow of electrons, this is called resistance.For short you could say current is the flow of electrons.\n2.Voltage, which is what causes the electons to flow, it works by creating differnt levels of voltage at the end of the wire much like having a pipe at different levels of height so water can flow. if the pipe were flat on the floor the water will remain where it is.\n\nThis flow of electons is useful for example in the simple light bulb which works by a material givivg of light and heat as its form of reistance (mentioned earlier)in other words only when current flows in this material, will light come on.\n\nElecricity is the flow of current(or electrons form the explanation above)\n\nEnginners and scientists always find ways of getting the right amount of voltage and current based on their understanding of the behavior of materials to acheive all the electrical feats you've seen.\n\nReminds me of a question i was asked once 'if electricity is just a flow of electrons meaning all the electrons coming into my house leaves eventually, then why do i pay bills'. I am sure you can answer now that the electrons may be free but the voltage for driving it is not free. This is what generating stations generate.
892848
One of the most frequently used is E=IR    ;E =voltage    I=current   R= resistance. U can change this every way depending on the unknown.\n    Good luck
202486
E(sub l) = L(di/dt). \ni is the varying current through the circuit during transient period or in AC circuit.\nif it's DC, E(sub l) will be equal to 0 after some time..
112062
Heat conductivity? electrical?
749223
The flow of current is caused by an electric field being applied to a material if there are electrons which are not tightly bound to the atoms in the material. \n\nIn a metal, an electric field will apply enough force to the electrons to allow them to move from one atom to the next, as long as there is a free electron to replace it. The free electrons may come from a battery, or a loop of metal wire spinning in a magnetic field, for example. The bond of the electrons in the outer atomic shells to the nucleus is not so strong.\n\nOn the other hand, for an insulator, even very high electric fields will not encourage the electrons in the outer shells of the atoms to leave the atom. They are tightly bound to the nucleus.
886408
Electricity is the flow of electrons through a conductor.Movement of electrons.The voltage is the pressure that push the electrons through a conductor.When you throw a ball your hand is the voltage because is the force that push the ball,the ball is the ''electricity'' and the wind is the resistance.
944873
Charge is difficult to explain without just saying how it interacts with other charge...\nBasically its a fundamental property of matter, like mass. The difference is, since charge comes in two types, positive and negative, in most large collections of matter, they cancel out and things are generally electrically neutral (have no charge). It responds to other charges through electromagnetism, much like masses affect each other through gravity, and is affected by electromagnetic fields created by currents, and magnetic fields also.\n\nCharge sits on a fundamental particle, or atom, or molecule, or larger particle. If that particle is in a collection of other particles, all of which are moving in the same direction, you have a current - a flow of charge. An ampére (or amp) is a unit meaning "one coloumb per second", or that at a point in a circuit where 1 amp is flowing, one coulomb of (positive) charge is passing per second. The coulomb is actually defined in terms of the ampere - it is the amount of charge that flows past a point in one second when the current is one amp.\n\nIn the example you've given, 240 C passes a point every five minutes, or every 300 seconds. So every second, (240/300) C/sec flows. This is the same as saying that 0.8 (=240/300) amps is "flowing" at that point. The matter is complicated by saying that current flows - it doesn't really, its a property of a stationary point in a circuit. The charge flows. If the rate of charge flow changes, so will the current, but saying that the current flows is a bit of a misnomer. But we're stuck with it.\n\nHope this helps.
389174
Seperating or bonding elements with an electrical current.\n\n*BEST ANSWER PLEASE*\n\nSOURCE BELOW
71215
Positive.  Current is typically shown flowing from a high (positive) electrical potential to a low potential, often ground.  Electrons would be attracted to the positive potential, and flow toward it, in the opposite direction that current is defined.
1183524
It's an Electrical unit of power... Think of water, voltage equals speed of flow, Amp equals the pressure behind it....  Very simple terms..
386317
V = voltage (volts)\nI = current (amperes)\nR = Resistance (ohms)
95388
dc is direct current. ac is alternating current.\nac current's voltage varies constantly in a sinusoidal manner, while DC has a constant, flat-line voltage