I think the medium of a conductor (wire) allow the electrons to flow from one point to another, usually from negative to positive. Electric current is simply the flow of electrons from one point to another. This is described the release of energy by the old formula of the electric current passes through a conductor is directly proportional to voltage and inversely to the resistance. Every conductor has its resistance, by introducing the impurity to the electric wire, the wire becomes the heater element.
It doesn't If you run electricity through a resistive wire, it is converted from electric to heat energy. If you run the electricity through an electric motor, it is converted to mechanical energy. If you run it through a light bulb, you convert it to light energy. If you run it through a speaker, you convert it to sound energy.
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I think the medium of a conductor (wire) allow the electrons to flow from one point to another, usually from negative to positive. Electric current is simply the flow of electrons from one point to another. This is described the release of energy by the old formula of the electric current passes through a conductor is directly proportional to voltage and inversely to the resistance. Every conductor has its resistance, by introducing the impurity to the electric wire, the wire becomes the heater element.
http://en.wikipedia.org/wiki/Electric_current
It doesn't If you run electricity through a resistive wire, it is converted from electric to heat energy. If you run the electricity through an electric motor, it is converted to mechanical energy. If you run it through a light bulb, you convert it to light energy. If you run it through a speaker, you convert it to sound energy.
1. heat energy (heating elements)
2. light (light bulbs)
3 electromagnetic energy (electrical motors)
4 electrolysis (electroplating)