Direct current is the name by which the constant displacement of electric charge is known , which moves from a conductor to two places of different potential and that, unlike current, alternate over time, its meaning does not change is say that the electric charge always maintains a constant direction. Although the fundamental characteristic that allows identifying direct current is continuous flow, it is said that all current is continuous as long as its polarity does not change, regardless of the fact that its intensity is diminished by use. over time.
This type of current is produced by structures such as dynamos, batteries, batteries, among others. In any of the aforementioned devices, a constant tension will be produced between its extremes that will not change over time. For example, if a battery is 24 volts, all those receivers that are connected to it will always be at 12 volts, in addition to that, the electrical flow that will circulate through the receiver circuit will always be continuous, therefore it should not change its direction, for this reason the poles will always be the same.
One of the first antecedents that led to the discovery of direct current was the invention of the battery, by Alessandro Volta, already by the 19th century it was common for this type of current to be used to transmit electricity, however during the During the 20th century, with the arrival of alternating current, the use of direct current declined.
The most outstanding difference between alternating current and direct current is the fact that in alternating current there are variations in terms of its magnitude and sense, said variation being cyclical.
Although is the AC which more use level world has, there are devices using DC power to operate, especially those devices that use electronic, such as the computer, which use a source of power that transforms the tension in a much more according to the requirements.
