The electricity when fed into the transformer remains in that as and when utilized it gets released. How the electricity is being stored in the transformer.  What is the theory ?
201574
Transformers do not store energy, that would be a battery or a capacitor.  Transformers work by wrapping wire around an iron core that is basically a circle.  For each wrap of the wire on the input side, you divide the total number of wraps into the voltage. If the input is 120 volts, and you have ten wraps, you get 12 volts per wrap.  Then, on the output side, you get an equivalent voltage per wrap.  So, that means on the example I gave, if you have five wraps on the output side you get 60 volts.  (5 x 12 volts = 60) This example would be a step down transformer, because you have a lower voltage than you started with.  If you have 20 wraps on the output side, you would get 240 volts. (20 x 12 volts = 240)  This is a step up transformer.  Note: Using Ohm's Law, you do not actually increase the total amount of power available, only change it's configuration.  Thank you, Nikola Tesla, inventor extraordinaire.
103206
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
670162
You asked several questions.  My answer applies to the generation of "free electrons".\n   If you can, picture the structure of an electronic vacuum tube, the invention of which (the triode, at least) is attributed to Lee Deforest. Thomas Edison worked on  similar devices.\n1) A material (such as Thorium) is electrically heated to a temperature such that electrons are "boiled off" and are electrostatically attracted to a positively (voltage) charged "plate" in a vacuum.  This flow of free electrons is a current (amperes).\n2) These electrons are NOT recycled.  The Thorium gradually deteriorates - is worn out.  \n3)  In a similar manner, this may be a source of electrons in the devices you mention.
596743
The top answer is incorrect.  In both cases, the current woul go on infiniitely, because energy will keep on traveling, but the current will get weaker and weaker, because it will keep spreading aparty, until the ammount of current in negligeble.\n\nHope this helps.
107547
Think of the analogy between the flow of electricity and water where voltage is pressure and current is water flow.  It take voltage (pressure) to cause current (water flow).  Therefore, current (water flow) will occur in the direction under greatest voltage differential (pressure).  Because you may be working with more than one voltage source (two transformers or ttwo battery cells?) one of the sources may be adversely affected.  Are you working with AC or DC?  You may need to avoid connecting a circuit for example that would be like charging a car battery with the leads reversed.  Good luck.
438222
One would think it is a dead short.  But since the wire is coiled up around a soft iron core it forms a good sized inductor.  Since the voltage applied is a sinusoid of 60 Hz, the inductor acts as an additional impedence to current.  So you have the resistance of the thin gage wire plus the impedence of the inductor to keep things from shorting out.\n\nIncidently, when the secondary side of the transformer is conducting current, the effect of the inductor on the primary side is reduced.  So more current flows in the primary side to provide the power required by the secondary side.
55765
To answer your question first: Yes, it will generate a back EMF in the circuit each time the power to the electromagnet is turned off, but this energy is never equal to the energy which was originally applied when you turned the switch on.  Nothing in life is free :)  \n\nWhat you're describing is actually called a transformer. A transformer works by applying an alternating current (equivalent to turning your hypothetical switch on and off very quickly, many times per second) to one coil, which induces current in another coil (or several, depending on the design).  \n\nWhile a transformer can be relatively efficient, it can never be 100%, and certainly not MORE than 100%, as you describe.
355943
I dont understand your question.  How can things work without electricity?  Electricity is power.  And power is essential for any instrument to work.  Do you mean to ask about using alternative electricity?\n\nYeah you can put the fridge in snowpacked mountains which will make things inside cool.
274850
It depends on the location of the transmission lines. The electrical power is usually brought to domestic consumers  at 11 kv or 11,000 volts and the same is brought down to 440 volts by transformers, for three phase distribution lines. To bigger industrial installations, the power may brought at 33 kilo volts also.  From generating power stations, the electricity is sometimes transported by upping it even to 400 kv sometimes. Higher voltage means lower current for the same power to be transported with a given cable which will cause less resistive heating i.e. less power loss in the transmission cables.
521578
First of all generator generates electricity. Electricity is tapped from armature of the generator. While in electrical motor , supply is given to the armature. As far as your question is concerned since the armature is rotating while magnetic field is stationary only way to tap the supply is through brushes. Continuous wire will break .
338807
Partly, it's the path the electricity takes.\n\nBut remember, it's not the volts that kill ya, it's the amperes.\n\nI once shorted out the entire electrical system of an old car engine with my bare hands (don't ask why; I was an idiot)  This was thousands of volts - but there's so few amps going through the distributor that all I got was a nasty jerk and a really funky hairdo.  \n\nBut just because I survived that stupidity - don't try it.  You could get a big boo-boo.
37539
This might help\n\nhttp://www.ttec.co.tt/consumertips/conserveelectricity/default.htm
464521
First, what is the input voltage and the desired output voltage?  Is the output voltage fixed, or do you need a range of adjustment (taps)?  Do you need isolation between the input and the output?  If not, an autotransformer (single winding) might be acceptable.  What is the frequency, and is it single phase, three phase Y, or three phase delta?\n\nNext, what is the power rating?  Small transformers are usually rated in output current, whereas larger transformers are rated in KVA.  This is the maximum load;  a smaller load would not be a problem.\n\nFinally, what are the mechanical factors?  Does it need to be hermetic or can it be open frame?  Do you want terminals or wire leads?  What shape and size?  What is the mounting?\n\nIt's not really that hard.  Usually you can browse through a catalog and find the transformer you need in minutes.
89816
The secondary voltage is determined by the ratio of turns on the primary versus the number of turns on the secondary.\n\nN1 = Number of turns on the primary\nN2 = Number of turns on the secondary\nn  = Ratio of turns = N1 / N2\n\nV1 = Voltage of the Primary\nV2 = Voltage of the Secondary\n\nV1 = V2 x n    or    V2 = V1 / n \n\nThis only works exactly in an "ideal transformer"  There are, of course, resistive losses, coupling losses, etc. that will affect the final numbers in the real world.
448352
The best answer you can get is by going to howstuffworks.com. They have a very detailed description.\n\nBut basically, capacitors store electric energy and release it when it is needed most. A capacitor has two metal plates inside it, to hold the charge, and a material called a dielectric, which could be just about anything that is non-conductive, to keep the plates from touching each other. (I think that's what you were asking about the material between the capacitor.)\nThe one plate connected to the positive power loses electrons to the power source, and the other is connected to the negative, and gains electrons, thereby becoming electrically charged.\nA capacitor can be used to smooth out a DC voltage, supply extra power to a motor on start-up, or a large number of other things.\nBy the way, capacitance is measured in Farads, or, more commonly, micro-farads, nano-farads and pico-farads, which are very small parts of a farad. 10 to the power of -6, -9, and -12, respectively.
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The electric company generates (makes) electricty, which they send through wires. These wires go to every house. In some places, you can seem them on the street, but in most places they are underground.\n\nWhen you flip a switch, your are connecting the lightbulb to one of these wires. So electricity flows from the wire to the lightbulb. When you close the switch, you disconnect the 2 wires.\n\nThat is what happens. How electricty is made, and how lightbulbs and switches works is a bit more complicated, but for that I suggest Wikipedia:\n\nhttp://en.wikipedia.org/wiki/Electricity\n\nThe basic idea behind generating electricity though, is that you are freeing electrons from atoms, which then go to other atom/s that absorb them.
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I'm assuming that the current is not changing with time other than the initial turn-on transient.\n\nWhen the current has reached a steady state (didn't say reached zero, but some final state), you are in the area of electromagnetics called electro/magnetostatics and the magnetic and electric fields are uncoupled. For the situation that you describe (I'm assuming no stationary charges external to the wire), the Electric Field Density is zero.\n\nYou might be tempted to use Gauss' Law to find the Electric Field from an individual electron as it moved down the wire, but the summation at any particular point in space from all charges moving in the wire will sum to zero.\n\nWhen the current is first turned on you will have a changing magnetic field and therefore an electric field. However, that electric field will die away rapidly.