The dangers of electricity to human health
The passage of an electric current through an object creates resistance to this current that prevents or impedes its passage, and the resistance is usually in the form of heat that heats that body to high temperatures that may cause it to burn, so electric shocks with a high voltage that ranges between 500-1000 volts in the event of exposure It has the human body causing serious physical burns that lead to burning the tissues of the body, and from a physiological point of view, the effect of these burns is similar to burns resulting from burning with a flame or any source of high temperature, and burning with electric current leads to burning tissues under the skin and burning its internal organs, The risk of burning is proportional to the amount of electric potential and the duration of exposure to the body.
The human nervous system is severely damaged if exposed to a certain electric current, which may be the most dangerous effect on humans. The nerve signals that regulate the functions of the body, its response, the processes of thinking and remembering, and sensation, and these nerve signals are nothing but precise electrical signals of voltage and current, so the exposure of these sensitive cells to a large electric current will affect the amount of current and voltage that they produce.
And because the nerves of the human body consist of weak tissues that are difficult for them to resist the electric current, the extent of the damage may often be significant, and the amount of wear and damage to the nerves and the brain caused by the electric current is commensurate with the amount and size of the injury, so these effects range from effects whose symptoms disappear with time, such as tingling pain, numbness, or difficulty moving the limbs, which sometimes may remain permanent, and other serious effects affecting the central nervous system that may constitute a state of stupor, memory loss, serious seizures, or respiratory arrest that leads to death, and it should also be noted Some injuries lead to a state of mental disorders.
Effects on movement and muscles
As we mentioned, exposure to an electric current affects the nervous electrical signals sent by the nervous system, and one of the most important organs that are affected in the human body by this matter is the muscular system, so that its ability to receive these nerve signals stops, and thus limits any muscle activity, so when the muscles are exposed to an electric shock they contract involuntarily and completely preventing movement. If a person grabs an object that conducts electricity, the forearm muscles responsible for flexing the fingers contract more powerfully than the forearm muscles responsible for extending the fingers, which makes the victim hold on to the electrical conductor, whether it is a wire or something else, and unable to leave it. This exacerbates the injury and its seriousness, and the injured person will never be able to move away unless the electric current is separated from his body, and exposure to an electric shock may lead to suffocation or death. Because the effect of the electric shock reaches the heart muscle and the diaphragm muscle that controls the lungs, and it can stop them completely.
Effects on the heart
The heart is directly affected when subjected to an electric shock, as the current search its way for the weakest points of resistance in the body, which are the blood vessels and nerves. in its pulses and thus the occurrence of what is called ventricular fibrillation (in English: Ventricular Fibrillation), which is usually fatal; Because all heart muscle cells move independently and ineffectively, and the heart will not be able to regulate its pulses unless a defibrillator is used to regulate the pulses and save the victim, and a current of more than 200 mA can lead to the heart muscles stopping Movement, even if the exposure to this current is within parts of a second, and if an electric current of 4 amps arrives, it will cause complete paralysis of the heart muscle and it will not be able to pump blood at all. As for the arrival of a current of 5 amperes to the heart, this means that the heart tissue is completely burned.
Electrolysis is defined as the flow of ions in opposite directions through a body that conducts electricity, and the human body is a suitable conductor for this process. to a long time to recover from.
To learn more about the dangers of electricity and how to prevent them, you can read the article The dangers of electricity and how to prevent them
Electricity hazards to the environment
Electricity is one of the forms of clean energy and is relatively safe to use, and despite that, it has many negative effects on the environment in its transmission and generation processes, and among these negative effects is what is clearly visible such as smog, other effects cannot be noticed with the naked eye, but they are harmful to humans, And the emergence of these negative effects begins before the construction of electric power stations and extends for a long time, and their effects may not disappear even if the work of these stations stops.
The generation of electric power in power stations leads to the release of many harmful emissions to the environment, and it is divided into solid, liquid, gaseous, and radioactive emissions, which have negative visual effects, as the presence of power stations and transmission lines distorts the general view and may lead to noise. Numerous power generation plants vary in the size of their impacts and damage to the environment. For example, power plants that operate on fossil fuels release many toxic gas emissions such as oxides of sulfur and nitrogen, carbon monoxide and hydrocarbons, and solid emissions such as dust and ash that remain suspended in the air. The energy that works using nuclear energy, all its solid, liquid, and gaseous emissions are radioactive emissions that are very harmful to the environment.
Electricity transmission lines and the infrastructure used in the distribution of electricity also affect the surrounding environment. Electricity towers and their extended lines distort the visual scene. They also affect vegetation and wildlife if these towers are close to them. This is why some urban areas extend power lines underground. , which certainly increases the material cost.
Concept of electrical fires
An electrical fire is defined as a fire resulting from the flow of an electric current directly or due to static electricity, and this fire may arise as a result of an error or malfunction in one of the parts of electrical appliances and machines such as wires, cables, electrical circuit breakers, and various other components. An electrical fire usually starts from Electrical panels with overloads, which makes the distribution of electricity inappropriate and overloaded, and in some cases, the reason for the burning of electrical panels may be the end of their life span, and the presence of lighting equipment near flammable materials can be a cause of an electrical fire, as this lighting works As a source of heat needed by the fire.
Electrical fire hazards
Every year, electrical fires cause hundreds of deaths and thousands of injuries, whether from the families who were exposed to the fire or from the fire and rescue teams trying to fight the fire, in addition to the loss of hundreds of millions of money and property. The effects of these fires are not limited to lives and money only, but also cause many difficult and long-term physical and psychological injuries, and these fires often break out in homes due to defects in electrical tools, errors in use or connections, or misuse and maintenance of electrical equipment.
These fires break out at a very high speed, which may provide the family with only a few seconds to save themselves and their pets, and this means that they will lose many of their possessions in this house from family heirlooms, memorial photos, and precious memories that cannot be replaced, and by leaving the house safely, the family will face many difficulties that lead to Changing their lives and daily routine, even if the fire damage is limited. These difficulties are represented in finding a new safe house, food, drink, sufficient clothing, and many psychological difficulties that may lead to depression as a result of psychological pressure. The family will also find itself forced to deal with insurance companies, and it will take a period It takes a long time to recover from the psychological and physical effects of the fire.