Alternating current is a type of electric current that is characterized because its sense and magnitude are variable in a cyclical sense, being the most frequent form of oscillation is known as sinusoidal (a curve moves up and down) and it is thanks to her that it is possible to achieve that energy is transmitted much more efficiently. It is important to note that even though the sine wave is the most common oscillation, cases may arise where the needs require another form of oscillation, be it triangular, square, etc.
Undoubtedly, the aspect that stands out the most about this type of current is the fact that during a short period of time there is a positive and a negative pole and then said polarity alternates, this happens the amount that the current has cycles per second. Although the polarity varies continuously, the current will always have a sense from negative to positive, as with sources that provide direct current. This type of current is represented in the Spanish language with the acronym CA. Another aspect that should be highlighted is that both in homes, offices, etc., electricity enters as alternating current and it is she responsible for the radio signals and television can be transmitted thanks to the electrical wiring through which said current travels.
As for its history is necessary to go back to the nineteenth century, time when Nikola Tesla invented the engine AC, after such precedents were several inventors based on said engine they made great progress, an example was the first precedent of a transformer, created by William Stanley, with which he was able to transport alternating current to a pair of isolated circuits.
Another fact of great historical relevance was the battle that was fought between alternating current against direct current, with alternating current being the winner, since the wide need to be able to transfer electricity to scales much greater than the possibilities of direct current offered. Not to mention the fact that alternating current is much easier to transform.
