The meaning of Electricity Any appliances that we use in our daily lives such as household appliances, office equipments and industrial equipments, almost all of those things take the electricity. Therefore, we should understand the electricity. The first question that we will find out the answer is "where does electricity come from?"

All matters are made up of atoms. Ask the next question, "What are atoms?" Atoms are the smallest part of an element. They are composed of nucleus and electrons, the electrons surround the nucleus. Elements are identified by the number of electrons in orbit around the nucleus of the atoms and by the number of protons in the nucleus. The nucleus is made up of protons and neutrons, and the number of protons and neutrons are balanced. Neutrons have no electric charge, protons have positive charges (+) and electrons have negative charges (-). A positive charge of proton equals a negative charge of electron. Electrons are bound in their orbit by the attraction of the protons, but electrons in the outer band can become free of their orbit by some external forces. These are referred to as free electrons, which move from one atom to the next, the electron flows are produced. These are the basis of electricity. Materials that allow many electrons to move freely are called conductors and materials that allow few free electrons to move are called insulators. All matters are made up of atoms that have electric charges. Therefore, they have electric charges. For the matter that have a balanced the number of protons and electrons, the positive charge force and the negative charge force are balanced. It is called neutral state of an atom. (The number of protons and electrons remain equal.) "Static electricity" represents a situation that all things are made up of electric charges. For example, the rubbing of material against another can cause the static electricity. The free electrons of one material move forcefully till they are freed of their orbits around the nucleus and move to another. The electrons of one material decrease, it presents positive charges. At the same time, the electrons of another increase, it has negative charges. In general, the charge producing of the matter means the matter has electric charges. It has positive and negative charges, which is expressed in coulomb.