Unit A ampere Electric Current In the field of Electric Current, an ampere (A), often shortened to amp, is the unit of measurement for electric current. It is one of the seven base units in the International System of Units (SI) and is named after André-Marie Ampère, a French scientist who made significant contributions to the study of electromagnetism. An electric current is the flow of electric charge, usually through a conductor such as a wire or a circuit. The charge is carried by charged particles, usually electrons, and the flow rate of these particles is what we define as current. The ampere represents the amount of electric charge passing through a cross-section of a conductor in a given period of time. One ampere of current is equivalent to the flow of one coulomb (C) of electric charge per second. Mathematically, it can be represented as: 1 A = 1 C/s In simple terms, when there is a flow of one coulomb of charge per second through a conductor, the electric current is one ampere. The ampere is used to quantify the flow of electrons, which is essential for measuring and understanding various electrical properties like voltage, resistance, and power (in the context of Ohm's Law and the Power Law).