Electric Current

An Electric current is a flow of electric charge through a medium. It is a form of energy. All matter is made up of atoms, and an atom has a center, called a nucleus. The nucleus contains positively charged particles called protons and uncharged particles called neutrons. The nucleus of an atom is surrounded by negatively charged particles called electrons. The negative charge of an electron is equal to the positive charge of a proton, and the number of electrons in an atom is usually equal to the number of protons. When the balancing force between protons and electrons is upset by an outside force, an atom may gain or lose an electron. When electrons are “lost” from an atom, the free movement of these electrons constitutes an electric current.
The SI unit for measuring the rate of flow of electric charge is the ampere, which is charge flowing through some surface at the rate of one coulomb per second. Electric current is measured using an ammeter.
In daily life, the word “electricity” adequately refers to a number of physical effects. Like.
Electric charge: A property of some subatomic particles, which determines their electromagnetic interactions. Electrically charged matter is influenced by, and produces, electromagnetic fields.
Electric field: An influence produced by an electric charge on other charges in its vicinity.
Electromagnetism: A fundamental interaction between the magnetic field and the presence and motion of an electric charge.
Electric current: A movement or flow of electrically charged particles, typically measured in amperes.
Electric potential: The capacity of an electric field to do work on an electric charge, typically measured in volts.