sähkövuon

Sähkövuon, also known as electric current, is a flow of electric charge, typically measured in amperes. It is the rate of flow of electric charge past a point or region. In a conductor, such as a metal wire, electric current is carried by moving electrons. The direction of conventional current is opposite to the direction of electron flow, which is from the negative terminal to the positive terminal of a power source.

The magnitude of the electric current is determined by the voltage applied across the conductor and its resistance, as described by Ohm's Law (I = V/R), where I is the current, V is the voltage, and R is the resistance. The SI unit of electric current is the ampere, which is defined as one coulomb of charge flowing past a point in one second.

Electric current is a fundamental concept in electrical engineering and physics. It is essential for the operation of electrical devices and systems, such as power grids, electronic circuits, and batteries. The study of electric current and its behavior in various materials and conditions is a key area of research in these fields.