Explain Electricity & Current. and what is the diffrence beetween them.?
340925
compare electricity to water, and compare current to a river.\n\nstatic electricity is electricity, but has no current, much like a pond is made of water, but it tends to stand still. Current is the concerted flow of both water and electricity. As electricity flows through a wire, it is much like water flowing through a pipe. \n\nyou can compare voltage to the water pump. The larger the voltage/water pump, the stronger and/or faster the flow.
229031
Electric current is given as the charge flowing through a given section per unit time.\n\nThe SI unit of charge is the Coulomb.  The SI unit of time is the second.  Therefore, the SI unit for current is the Coulomb per second (AKA, the amp).\n\n1 Amp = 1 Coulomb / second\nSo in 1 second, 1 Coulomb of charge has flowed past a given section of wire at 1 amp.\n\nOne electron has a charge of 1.6021765314 ×10-19 Coulombs.\nIf in 1 second, 1 Coulomb of charge is flowing through a section of wire, then there must be about 6.241 E18 electrons flowing past that section.
265804
Electricity doesn't exactly do work.  Electricity is a form of energy that enables other things to do work.  Like food in your body.  Your body does the work, the food provides the energy.  Electricity is one form of stored energy that is extracted from a number of different sources, like coal, oil, the sun, flowing water, or splitting atoms.
846799
It takes energy to push that current through your lights and appliances, and that's what your paying for. One way to see it is to consider that what comes out the downstream prong is at 0 volts and therefore of no use to anyone. Or, you could just wire all your lamps in series and see how that works!
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....
118492
AC is when the current alternates, thus the term Alternating Current. DC is Direct Current where the electron stream does not change directions.
381406
Define power.\nElectricity is the flow of electrons through a substance.\nIn the United States, electricity can be generated through coal/fossil fuel burning plants, nuclear power plants, wind(mills), and solar energy collection.\n\nIn fossil fuel and nuclear plants, they use the furnace and nuclear reactor to heat up water in order to turn a turbine, which spins around an electromagnet to generate electricity. There is much loss of energy through this process because much of the energy used to heat the water is lost through convection.  In windmills, the wind directly turns the turbine, so there is not as much loss, plus, it is a renewable resource.
389086
Ampacity is the amount of current flowing in a circuit. The wire size, depends on the amount of current flowing, and usually a safety margin based on the heating effect from the current in the wire.\n\nFor a typical house wiring, at 120VAC, the current is 500W/120Vac = 4.2amps. The typical wire size is 14AWG. This wire can easily handle the 4.2amps. Actually, the 14AWG is good up to 15amps for most house wiring per NEC national electrical code.\n\nIf you are working with a 12VDC system or circuit, then the current is 40amps and you should be using 8AWG wire minimum.\n\nWhat's your application?\n\nCheck out the following link:
1141664
house is AC, lights hooked directly in- AC\nCar battery DC, lights run off battery- DC\nTransformers are AC- AC\nBattery charger run through a rectifier- DC\nElectromagnet (had to look this one up)- either
370125
you are almost right, electrical ground is allways relative to a higer potential source like a live wire and the current flows toward ground from the higer source, when you ar isolated (you have rubber shoes, you have a high resistance in the way of the current), there still a current flow, but it is so small (nano amperes) that you body cant feel it
34593
... or to use the hydraulic analogy, current is how much water (electrons) is flowing through the pipe.  Voltage is the water pressure.
251203
Electricity. It's everywhere. It's in your house, in the computer on which you are reading this, in the air, in your body, blah blah blah. You get the point. It also plays an important integral part of sound systems. From the microphone to the loudspeaker, everything is electrical, and you need to know a few things about it.\n\n\nANYONE FOR FROGS' LEGS?\n\nAn Italian scientist named Alessandro Volta did experiments with electric charge back in the 1800s; he managed to make dead frogs (yes, frogs) "move" by using them as part of an electrical circuit, and is credited with providing us with a lot of information about electric potential. The volt was thus born. Voltage is defined as the electric charge between two points. In household terms, voltage is akin to water pressure available to do work. It can't do any work until a circuit (the plumbing and a water tap) is complete so that current (the amount of water) can flow. In engineering terms, voltage is the potential energy of a bunch of electrons. Current, measured in Amperes, is the flow of electric charge; we can say that current is the rate of flow of electrons, but technically it is the opposite flow that we call current-- as electrons move in one direction, holes are left behind, and appear to flow in the opposite direction. We should also remember from our physics classes that there is a fundamental equation used in electricity: Ohm's Law.\n\n\nOHM SWEET OHM\n\nOhm's Law is the mathematical relationship between voltage, current and resistance. It is named after George Ohm, its founder. Ohm's Law states that the current in a conductor is directly proportional to the voltage across it, and inversely proprtional to its resistance. In simpler terms, the law states that more voltage will produce more current if resistance stays the same, but higher resistance will cause the current to decrease if the voltage stays the same. In our household plumbing example, we can say that Ohm's Law dictates that more water pressure will produce more output if the diameter of the pipe stays the same, but a smaller-diameter pipe will cause the output to decrease if the water pressure stays the same.\n\nWith these three basic components, we have electricity. Current is "drawn" from a power supply due to the presence of a voltage placed across a load, or resistance. For instance, a typical electrical outlet has 120 volt potential (pressure- it has the capacity to give you 120 volts), but nothing is connected. If you put some load across its terminals, like a lightbulb or steam iron, you then have a complete circuit in which electrical current can flow. As we said before, a higher resistance will yield less current than low resistance. A direct short will cause a very large flow of current, because there is no resistance. If the supply is capable of delivering enough current, it is likely that the wire will eventually heat up and melt. This is why circuit-breakers and fuses are used. They limit current flow by opening (as opposed to shorting) a circuit before current flow becomes too large-- a 15A circuit-breaker will trip when the loads connected to that circuit try to pull more than 15A of current.\n\nMakes sense, right? Good. Ohm's Law is represented as the rate of flow of electrons, and voltage is represented as the electric charge between two points.\n\nOhm's Law:V = I x R, where V = Voltage, I = Current, and R = Resistance. \n\nHELL'S BELLS\n\nElectricity appears in two forms: alternating current (AC) and direct current (DC). Direct current does not change directions-- the electron flow is always from the negative pole to the positive pole-- although as we mentioned before, the electrons themselves don't really "move," it's the holes that are created that "move." Direct current is almost always what is used inside of electronic devices to power the various internal components, but it is a harmful thi
206602
In D.C circuits current flow is  always  in one direciton.\nIn A.C circuits current is fluctuating that is changing its direction periodically, say 50 times per second or 60 times per second. But in A.C when the current is switched off suddenly in some circuits having coils and condensers there will be back emf and sparks will be prduced in the switching system. Normally the device is manufactured taking this into account.
808466
electric induction is the induction of current...\nyou can induce current by have a coil with current i, and a magnet...\nthe magnet may be the one moving forth and back or the current-carrying coil, or both...\nac dynamo is what makes current alternating.... or changing in direction... unlike dc....\nwhen dc makes dynamos mechanically usable, dynamos are used make ac...
224701
A volt is a unit of voltage, while an ampere is a unit of current, or amperage. You can think of voltage as how much "push" the electricity has. Current is how much charge is moving through over time (1 A = 1 C/s). For a given resistance, more voltage means more current - they are directly proportional, but not the same thing. V = IR, where V is voltage, I is current, and R is resistance.
1115026
Voltage is simply the potential electrical "pressure" of a circuit.  Current is the actual flow of electrons, so that's what's felt.  Think of it in terms of water & pipes.  You feel the water flow, not the potential pressure behind it.  If there is more resistance (smaller pipes, more valves), the potential pressure of the water doesn't change, but the flow is reduced.
1145411
i gues.....um.......Electricity