Why does electricity exist?
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Because positively and negatively charged ions exist. Because electrons exist.
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Machines use electricity to run.  So, no refrigerators, no stoves, no air-conditioners, and of course, no lights.  No television, no radio, no such things as batteries, so no Ipods.  No computers.  And cars need electricity to create the spark that burns the gasoline.  So, no cars!\n\nThe impact of no electricity would bring us back more than 100 years.  We couldn't have modern medicines because their could be no place to make them.  And no refrigeration means no more supermarkets, no more ice cream, no more cold soda.\n\nHmm, what do you now think about electricity?
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The ancient Greeks and Parthians knew of static electricity from rubbing objects against fur.\n\nIn modern times  Benjamin Franklin's famous "invention" of electricity by flying a kite in a thunderstorm turned out to be more fiction than fact, his theories on the relationship between lightning and static electricity sparked the interest of later scientists whose work provided the basis for modern electrical technology. Most notably these include Luigi Galvani (1737–1798), Alessandro Volta (1745-1827), Michael Faraday (1791–1867), André-Marie Ampère (1775–1836), and Georg Simon Ohm (1789-1854). The late 19th and early 20th century produced such giants of electrical engineering as Nikola Tesla, Samuel Morse, Antonio Meucci, Thomas Edison, George Westinghouse, Werner von Siemens, Charles Steinmetz, and Alexander Graham Bell.\nclick here please:http://en.wikipedia.org/wiki/History_of_electricity
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You are confused.  Electrons don't conduct electricity.  They, collectively, make electricity.  They do work by going from high potential energy to low potential energy.  The potential energy is usually caused by concentration of charge, because like charges repel each other.  The movement of electrons is what we call electricity.  Charge is a measure of the difference between number of protons and number of electrons, if you multiply the difference by the charge for one electron you get the charge.\nA coulomb is a unit designed to be more usefull than the charge on an electron because it is large enough to work easily with..
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Best Answer Chosen By Voters:\nLet me give you a more understanding answer to what electricity is than Ubi did.\n\nTo study electricity you must first understand something very important...    \n \nWhat do lightning, a flashlight, an alarm clock battery, and a toaster have in common?\n  \n \n Are you still thinking? Here are more items to add to the list: a computer, a car battery, a light bulb, the shock you feel when you shuffle across a carpet and then touch something. Their common link isn't something magical...\nThey are powered by a form of energy called ELECTRICITY. \nIt helps us do many things.\n  \n\n\n------------------------------------------------------------\n \nThe Atom \nTo study electricity you must first understand something very important...    \n \nEverything is made of atoms. They are a very tiny particles made up of even tinier particles. The central part of an atom, called the nucleus, contains protons and neutrons. Orbiting around the outside of the nucleus are electrons. Protons, neutrons and electrons have their own characteristics. One of these is called an electrical charge. Protons carry a "positive" charge while electrons carry a "negative" charge. Neutrons carry no charge. Electricity happens when electrons get temporarily taken away from an atom.    \n \nNow that we have more information, it's time to look at our definition of electricity. \nELECTRICITY \nis a form of energy produced by the movement of electrons.   \n  \nA Little Electrical History...  \n                            Just 200 years ago, electricity was not used to power anything in the world. \n                            Who do we have to thank for discovering how to use it? \n     \n Electricity was not invented. \nIt occurs naturally in our world. People, however, have invented ways to measure it and to control it for our use. \nBen Franklin started working with electricity in 1740's. He believed that lightning was a flow of electricity taking place in nature. He performed his famous kite experiment in 1752 which proved that electricity and lightning were the same thing.\n\nLearn more about this great man and his experiment at \nThe Franklin Institute Online.  Thomas Alva Edison is another name important in the history of electricity. In the late 1800's he developed 1,093 inventions, but his most famous is the incandescent light bulb. He wanted to bring light into homes and factories. Up until then people used candles or whale oil lamps for light. \n \n\nHow many kinds of electricity are there?\n\nLet's think about the above examples for a minute... Did you notice that they don't all have wires! Electricity doesn't exist only in things with wires. The reason is that there are two kinds of electricity: static and current. \n   \n Try to figure out what types of electricity these are\nSTATIC ELECTRICITY:The Facts/ CURRENT ELECTRICITY:The Facts \na build up of electrons\n                              the steady flow of electrons between objects or places. It comes from far away on wires.\n \nstays in one place until it jumps to an object\nneeds a conductor, a substance that allows electrons to move easily through it\n \n                                   does not need a circuit \n needs a closed circuit to flow\n \nthe kind of electricity you feel after you drag your feet across a carpet and touch someone or something\n                                  the kind of electricity that powers the appliances and heat in your home\n \nlightning is static electricity on a more spectacular scale\n the kind of electricity in a battery\n\nHope this helps, worked really hard on it.
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Electricity is  flow of electrons in a conductive material like copper or any metals.  The atoms in the conductor are passing the electrons to the next atom in sequence (current flow in Ampere unit). \n\nAnalogy: \nYou can imagine people in line, passing balls in sequence to the next person until the balls reached the other end.\n\nThe force behind the movement of electrons (potential difference in Volt unit), is due to the excessive supply of electron (negative) from one end and lack of supply (Positive) from the other end. (They flow downstream like water).\n\nImagine if you connect two ends of wire to the positive and negative side of the battery. (But don't do it. That is called; short circuit)\n\nIf the wire is cut in the middle and you connect a light bulb between the two cut ends, The light bulb will glow. \n\nHere is the reason;\n\nBecause the light bulb filament (also a metal but doesn't melt easily) is smaller than the wire conductor and does not easily allow the passage of electron (resistance in Ohm unit), The flow of electron will be restricted to a certain amount (like a bottleneck in a pipe) this restriction will cause heat and light due to friction.\n\nMy best tailored answer for you ;=)
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Voltage is the parameter of electricity which causes current to flow when a circuit is completed. Voltage is always presented in an energized line, whether or not the circuit is complete. When the circit is complete, we say that electricity is flowing.\n\nHence, it is said that a cell is an electrictiy generating device.
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electricity (î-lèk-trîs´e-tê), class of phenomena arising from the existence of CHARGE. According to modern theory, most ELEMENTARY PARTICLES of matter possess charge, either positive or negative. Two particles of like charge, both positive or both negative, repel each other; two particles of unlike charge are attracted. The electric FORCE between two charged particles is much greater than the gravitational force between the particles. Many of the bulk properties of matter are ultimately due to the electric forces among the particles of which the substance is composed. Materials differ in their ability to allow charge toflow through them. Those that allow charge to pass easily are conductors,  whereas those that allow extremely little charge to pass through are called insulators,  or DIELECTRICS. A third class of materials, called SEMICONDUCTORS, is intermediate. Electrostatics is the study of charges, or charged bodies, at rest. When positive or negative charge builds up in fixed positions on objects, certain phenomena can be observed that are collectively referred to as static electricity. The charge can be built by rubbing certain objects together, such as silk and glass or rubber and fur; the friction between these objects causes ELECTRONS to transfer from one to another with the result that the object losing electrons acquires a positive charge and the object gaining electrons acquires a negative charge. Electrodynamics is the study of charges in motion. A flow of electric charge constitutes an electric current. In order for a current to exist in a conductor, there must be an ELECTROMOTIVE FORCE (emf), or POTENTIAL difference, between the conductor's ends. An electric CELL, a PHOTOVOLTAIC CELL, and a GENERATOR are all sources of emf. An emf source with an external conductor connected from one of the source's two terminals to the other constitutes an ELECTRIC CIRCUIT. Direct current (DC) is a flow of current in one direction at a constant rate. Alternating current (AC) is a current flow that increases in magnitude from zero to a maximum, decreases back to zero, increases to a maximum in the opposite direction, decreases to zero, and then repeats this process periodically. The number of repetitions of the cycle occurring each second is defined as the frequency, which is expressed in HERTZ (Hz). The frequency of ordinary household current in the U.S. is 60 cycles per sec (60 Hz), and electric devices must be designed to operate at this frequency. In a solid, the current consists not of a few electrons moving rapidly but of many electrons moving slowly; although this drift of electrons is slow, the impulse that causes it moves through the circuit, when the circuit is completed, at nearly the speed oflight. The movement of electrons in a current is not steady; each electron moves in a series of stops and starts. In a direct current, the electrons are spread evenly through the conductor; in an alternating current, the electrons tend to congregate along the conductor surface. In liquids, gases, and semiconductors, current carriers may be positively or negatively charged.
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Because water cunducts electricity. Thus if you put water on something electronic the power can go wherever the water is, burning whatever it touches.
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Actually, electrical charges from the ground meet charges from the sky.  We  live in a magnetic field of 219v-dc.   Charges build up in clouds and are attracted to charge harbored within the earth.
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Light is faster because electricity has to interact with the atoms it finds as it moves along a wire. Electricity is only a BIT slower than light, but you cannot tell the difference in real-life situations.
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A very early form of electric energy was the ancient egyptians made simple batteries from clay pots, copper rods and lemon juice. Probaly for primitive polarity experiments. Electricity was probaly first used practicaly by thomas edison when he created the lightbulb. The cathode ray tube was also a great success, made in the late 19th early 20th century. When they fired electrons in a contained glass tubs a black spot would show up on a far end. This idea eventualy evolved into the television. G.Boole a scientist in the 18th century created a form of math called Boolean Logic, this math has been used in circuit boards and electronics to this day. He also created a computational machine. It was far more mechanical than electronic however.
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Electricity...Water is life!
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Because switches are real, electricity is real, and light bulbs are real. Guess what isn't real, though?
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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
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Electricity is a form of energy that can be transmitted efficiently through copper wires because it is a good conductor. To transmit the same electricity through air, you will need very high voltage as air has a high resistance. Additionally, the efficiency will also be reduced as there may be arcing. High voltage is also dangerous.\n\nHowever, when we send a Radio Wave, it is also a form of energy. In the early days of Radio, there is a circuit that is popular with Radio enthusiasts called the Crystal Radio. The Crystal Radio does not need a battery to power it. It uses the Radio Signals itself. With some innovative design, one can tap into the Radio waves and convert that into electrical energy. This is a form of wireless electricity. However, the power level is very low.\n\nSo potentially, it is possible but there are probably many challenges ahead. Today, it is still not viable but we never can tell, technology has always done the impossible.\n\nFor very short range, electricity may be wirelessly  transmitted via induction (magnetic fields). Some pace makers are recharged via induction.
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Its is the amount of resistance.  Same reason the wire in a lightbulb grows.  There is some level of electrical resistance, even in conductive materials.  The resistance creates heat and eventual combustion.