Electric current | basic understanding of Electronics 

The electric current, the unit of measurement and the concept and utility of the electric current is our topic today,

What made me touch on this subject, i.e. the subject of electric current, is primarily that it is one of the basics of understanding electronics, but more than that is that the world of electronics is based on the interaction of electronic components with the flow of electric current.

What is the definition of electric current

Electric current is the flow of electric charge in electrical or electronic circuits, and this flow is done by moving electrons in conductors and this movement is completely synonymous with energy.

In fact, everything in the universe is made up of Atom atoms, and the atoms are composed of electrons and a nucleus with neutron neutrons inside, and Protons that carry a positive charge, while the charge of electrons is negative and revolves around the nucleus, so protons and electrons always tend to be attracted to each other due to the difference in charge completely charge Like a magnet, electrons are around the nucleus, that is, in its surroundings, and remain in that path without colliding with each other, and in some cases, one of the electrons may be removed from the atom by an external influence to occur at what is known as electricité.

Electric current measurement unit

Electric current measurement unit. Always and continuously, the global system works to unify physical units around the world under the name of the global system of units. This applies to electrical units as well as electronic units such as voltage, current, resistance, and power. The unit of electrical measurement is defined as the power produced by the flow of electrical current of 1 ampere with a voltage difference of 1 volt, and it is measured using the watt unit and its symbol is W.

As for the unit of measurement of voltage, the voltage is defined as the voltage difference between two points in a conductor whose resistance is one ohm and an electric current of which is one ampere, and its unit of measurement, as it is known, is the voltage, and it is symbolized by the symbol V.

As for the unit of measurement of electric current, which is the title of this paragraph, the electric current is defined as the rate at which the electric charge flows inside the conductor or the electric wire, and it is denoted by the symbol I, and it is measured in the ampere unit and its symbol A.

As for the unit of measurement of resistance, electrical resistance is defined as the ability to resist the passage of electric current through it, and it was discovered by the scientist George Ohm, and its unit of measure is the ohm, and it is symbolized by the symbol.

As I said at the beginning, dear dear friends, we will address this important topic, which is considered one of the most powerful basics of electronics, without it you will not understand and will not understand the principle of work of parts and electronic components such as resistor, capacitor, diode, transistor and other electronic elements. We just touched on the concept of energy and the unit of measurement of electric current. And other important points, but our topic will not be complete if we do not address the law that brings together all that we discussed above, which is the Aum Law. See what is this law and what it stipulates?

Ohm's law states that the current passing through a conductor or wire between two points is proportional to the potential difference across these two points, with the introduction of the proportionality constant, and the value of the resistance, and this usual mathematical equation that shows this relationship is reached which is V = R * I from which we conclude I = V / R where I is the current and its unit is amperes, V is the potential difference and its unit is volts, and R is the resistance of the conductor and its unit is Ohm, and more specifically Ohm's Law states that R in this relationship is constant.

Sources and methods of generating electric current

Electricity is often generated by water vapor, waterfalls, dams and winds. Likewise, electric current or electrical energy is generated using sunlight and other primary, alternative or secondary methods.

As for generating solar energy using water vapor, it is reflected in the rotation of the turbine blades or the Rotor that can be said, which in turn rotates the transformer and thus converts the kinetic energy into electrical energy and thus the production of electric current, as well as the water falling from waterfalls, dams or wind energy can be used to generate electricity as well And the same process.

 One of the ways to generate electricity is also using sunlight. Through solar panels, sunlight is converted into a continuous electric current, and it is worth noting that this technology has become widespread and has many uses. Small irrigation pumps can be operated and devices and equipment that contain batteries can be charged from During it, the best evidence of the success of this technology is the wide spread and many solar power stations that produce electricity with large electrical capacities estimated at tens of megawatts of alternating current.

 The importance of electric energy is very great through its many uses in daily life, in residential homes electricity is used for lighting and various heating and cooling processes, and in the transportation sector it has become possible to move vehicles using electric energy only by means of the batteries inside. But on the opposite side it has its risks like all things. . Electricity may become very dangerous if it is not handled properly. Water is a good conductor of electricity as it contains positive and negative charges that move freely, and as long as the human body contains a lot of water, if it is exposed to electricity, it will inevitably happen to him what is called an electric shock Electric shock, as electricity circulates in the body, and this may lead to burns and contractions In the muscles, breathing difficulties may occur due to the contractions that occur to the lung, and the heart may also be shocked, which leads to an interruption in its rhythms, and all of these things depend on the direction of the flow of electricity inside the human body as electricity tries to walk in the easiest way to reach the ground and this is The law of electric current always looks for the shortest path and has a low resistance, so attention, caution and knowledge of the principle of its work are important rules to avoid dangers.

In conclusion, I hope that this topic, which I tried as possible through it, to shed light on all aspects of electric current, such as mentioning its sources, the unit of measurement of electric current and even its benefits and risks, and all this until the reader completes the general idea of ​​the electric current, which we said is one of the basics of electronic and this is what We care.