Electricity

Electricity

No one can imagine his life without electricity, especially nowadays. With technology and industry, everything has become dependent on the existence of electricity, mainly in homes, schools, ministries, workplaces and various living. Where do we get electricity? How does electricity work? We need electricity in lighting, heating and so on. When the electrical current passes through the wires, the so-called boilers work. They are connected to the same electrical sources and the size of their wires varies depending on the equipment to be operated. Scientists have discovered from several studies that electricity is an electron that moves through wires. This current is a positive and negative electrical charge. The atoms contain an equal number of positive and negative charges so the atom is neutral. During the simple electrical circuit there is a positive and negative battery , Which in turn push the electrons from one pole to the other pole through the wires, when the electric switch is closed, when the electrons reach the lamp, pass through the wire is high temperature rises because it impedes the passage to prevent it move As a result of resistance, the heat rises and the lamp shines. Classification of materials Based on their ability to deliver electricity Some materials can connect electricity well, others can never connect, so the materials are classified into conductive materials such as metals, and other negative such as wood, in addition to the so-called semiconductor materials, which acts as a conductor Isolated at the same time as water. The main sources of electricity There are many materials that can pass electricity through the wires and the most important: Battery: because they contain chemicals capable of interacting and therefore moving electrons inside. Generators: They are made up of a magnet that moves between its positive and negative poles, and inside it are wires. When this magnet moves, the electrons move inside the files. Solar cells: so that they contain materials that in turn use sunlight as an energy source that helps electrons to move, such as some solar powered cars. For example, a battery that uses a light bulb or even a small recorder has a voltage of 1.5 volts. If we need a higher voltage, we use two or more batteries in a row to give a higher voltage. For example, two cells give a voltage of 3 volts 2). If we use six cells, the voltages will be 9 volts (1.5 x 6). As for the measurement of the current of the electrical current passing through the wire, it is measured in amps.