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موضوع عن أهمية الكهرباء بالانجليزي doc
موضوع عن أهمية الكهرباء بالانجليزي, موضوع عن أهمية الكهرباء بالانجليزي 2020, موضوع عن أهمية الكهرباء بالانجليزي للطلاب, بحث عن أهمية الكهرباء بالانجليزي.
Electricity is of great importance in all aspects of life, and it includes: lighting the house, the car, the street, and every place we are, through lamps and different lighting sources, and thus we can accomplish all tasks. .Electricity is what brings us water through generators and booster devices to reach homes, it is an essential source of life.
Definition of electricity
Electricity is a name that includes a variety of phenomena resulting from the presence and flow of an electrical charge. These phenomena include lightning and static electricity. But it contains less common concepts like the electromagnetic field and electromagnetic induction. In general use, it is appropriate to use the word “electricity” to refer to a number of physical effects.
Man discovered the existence of electricity from 600 years BC, when the Greeks noticed when rubbing amber with wool that amber works to attract straw, feathers, and light objects to it. At the same time, the Greek scientist and philosopher Thales studied this phenomenon and named amber with resin, which means electricity. In the sixteenth century, the English scientist William Gilbert studied this phenomenon and showed the difference between electrophoresis and magnetic gravitation, and in 1873 AD the French scientist Gram invented the electric generator device that converts mechanical force into electrical energy, known as dynamo. After that, the researchers noticed two types of electric charges:
The electric glass charge, and the electrical charge, and showed that similar charges repel each other and that the different charges attract, then the American scientist Benjamin Franklin came in the seventeenth century to prove that the electric charges are divided into positive charges and negative charges, and considered that negative charges are the increase in the glass charges. Negative charges are the shortage of glass charges, and these charges are not included in the composition of the atom.