Опубликовано 2012-12-15 18:42:10 автором Ruslan

electric current


Іn our time - a time of rapid development of electronics and artificial intelligence - something hard to imagine without electricity.

What kind of magic energy that is converted into light or heat? The interaction with matter creates various objects materialize our dreams and desires. And it's all thanks to an electric current.

electric current I - is the energy of directed motion of charged particles - electrons, which move along the conductors of an electrical circuit that has a resistance R.

makes you move an electric current through the circuit is the difference between potential - voltage U.

It's like the water pressure in the two containers : one level is several times larger, and therefore more pressure . Join the pipeline capacity and the pressure forces the water to flow from one container to another. Note the thicker pipe , the lower the resistance, hence more water running . The same thing happens in an electrical circuit conductors only running current.

Thus, the current in the circuit is directly proportional to voltage and inversely proportional to the resistance of the circuit. I = U / RU - the voltage in volts. R - resistance in ohms . I - the current in amps. This formula is called " Ohm's Law " - the most important law of electrical engineering. Let us write the two formulas derived from Ohm's law. For them you can see the voltage and resistance, respectively. U = I * RR = U / I Is there another way to remember these formulas - Triangle : Using it is easy. You just need to close that finger size, we are looking for. If the two remaining values ​​are at the same level - so they need to multiply . If one over another - so we must divide the top to the bottom .

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