Electricity is a physical phenomenon, whose propellant are electric charges and the energy that these promote can manifest itself either in expressions within the physical, luminous, as well as contemplating the mechanical or thermal area.
Although it is abstract in most of its expressions, as for example in the functioning of the nervous system of the human being, we can see electricity "more real" in the lightning when a strong storm develops. Also, electricity It turns out to be essential for the operation of complex machines and systems, as well as for the operation of small electrical appliances.
Electricity will originate from electric charges that are at rest or in motion and from the interactions that also occur between them. There are two types of electrical charges, some positive (gates) and others negative (electrons).
Although during the seventeenth and eighteenth centuries several scientists and physicists were dedicated to advancing the study of electricity, it was only in the nineteenth century with Maxwell's equations that electricity and magnetism would be unified in a theory as two manifestations of a same phenomenon. The telegraph and lighting (of streets and houses) were the first manifestations of these studies that allowed in this way to use it to improve the quality of life of human beings.
In this sense, electricity can be used in different ways to generate at least three resources: light (lamps), heat (heating systems) and signals (electronic systems). In the case of the electricity that we are supplied with in our homes, it is generated through different forms: wind energy, hydro energy or solar energy. In the first case, they are developed in parts of the United States and some European countries where a kind of "windmill" is installed that will be the receiver of the energy. In the case of hydraulics, they are the most developed, since it involves the installation of water dams in large bodies of water. Finally, solar energy is perhaps the least used so far, and it involves the placement of panels that receive the sun's heat located on the roofs of houses or large panels in open spaces. Since it is a residential installation, the owner of the house must bear the installation costs, which are not inexpensive, and perhaps this is why this type of power generation has not yet spread massively.
The unit of measurement for electric currents is the Ampere (A), although it is very common for us to associate household electricity with another measurement system, which is Volts. This unit is the one that measures the voltage of electrical current, and by means of the equation with the amperes, they generate the Watts (volts x amps = watts). Depending on the number of volts, we will get kilovolts, megavolts (the most used).
These measurements make it easier for us to easily identify the voltage of the electric current. For example, in Argentina the voltage is 220v. If I travel to another country, I will have to find out what "voltage" they use, since if I plugged in, a hair dryer for example adapted to the voltage of Argentina (220v) and in the country to which I travel they use a voltage of 240v, by plugging my appliance into the electrical current it is very likely that it receives a greater amount of voltage for which it is prepared and suffers a burn in its electronic circuits.
Today, electricity has become a commodity that most of the people on this planet Earth have and use very commonly in their daily lives. And what's more, for many, including myself, it is practically impossible to live without the benefits that this produces because, for example, it would be unlikely and impossible for me to be talking to you about it in this way.
Due to global overpopulation, and especially the concentration of population in large world cities, the issue of electricity generation is a frequent topic at world summits on the environment or human development. The water dams used to date, in addition to disabling said water for human consumption, are already insufficient, and then alternative ways to generate electrical resources must be sought in other types of sources, as we previously named, both wind and solar (still when they generate large investment expenses for companies or the State) they can become, in the future, the successors of hydro energy.
