Of all the types of energy is currently the most widely used electromagnetic energy, which is called electric.
The use of electric energy has improved productivity in all areas of human activity, to automate and implement a number of technological processes in industry, transport, agriculture and everyday life, based on new principles that accelerate, facilitate and reduce the cost of the process of obtaining the final product, as well as to create comfort in industrial and residential premises.
Electrical energy has drastically changed its production. Its unique property to pass into other types of energy has always been considered the physical basis of the future technology, and especially electrical engineering and power engineering, which in the early XX century became the beginning of the scientific and technical revolution. And it is not for nothing that the first steps of electrical engineering were called “a colossal revolution”. The development of the electric power industry today is the main condition for scientific and technological progress and technical improvement of production.
This is due to the following
- Any kind of energy (thermal, atomic, mechanical, chemical, radiant, water flow energy) can be easily converted into electrical energy, and Vice versa, electrical energy can easily be converted into any other kind of energy.
- Electricity can be transmitted to almost any distance.
- It can be easily split into any part (power receivers can be from a fraction of a watt to thousands of kilowatts).
- The processes of receiving, transmission and consumption of electricity can be easily and efficiently automated.
- Control of processes that use electricity is usually very simple (pressing a button, switch, etc.).
- The use of electricity contributes to the creation of comfortable conditions in the workplace and at home.
The only drawback of electric energy is the “lack of a warehouse of finished products”, i.e. to store electricity and save these reserves for long time humanity has not yet learned. Reserves of electricity in batteries, galvanic cells and capacitors are sufficient only for the operation of relatively low-power plants, and the shelf life of these reserves is limited. Therefore, electrical energy should be produced if and in such an amount when and in what it is required by the consumer.
Electricity is converted into mechanical power by means of electric motors, which are used to drive machines and rotating machines in various industries, agriculture, and everyday life.
In addition, electric energy is widely used in technological installations for heating products, melting metals, welding, electrolysis, to produce plasma, new materials using electrochemistry, for cleaning materials and gases, etc.
The work of modern means of communication; Telegraph, telephone, radio, television, and internet are based on the use of electric energy. Without it, it would be impossible to develop Cybernetics, computer and space technology, etc.
Electricity is now almost the only type of energy for artificial lighting. New areas of use of electric energy (magnetic cushion for vehicles, electromagnetic pumps for pumping liquid metals, etc.) are planned and mastered.
It is clear to all that normal life of modern society is impossible without electric energy. It is used by absolutely all household appliances; refrigerators, washing machines, lighting fixtures, irons, microwave ovens, computers, TVs, etc. it is difficult to imagine how we would live, turn off the lights in the apartment or shut up the TV.
In addition to urban apartments, a large amount of electricity consumed by farms, which are not only residential but also outbuildings.
As the owner of the house, you should know more about electricity than just be able to change the plugs or screw in a light bulb. It is necessary to understand the relationship between current, voltage and power, the advantages and disadvantages of AC.