Ampere
The unit of measurement of electrical current. In the meter-kilogram-second system, it is the steady current that, when flowing in straight parallel wires of infinite length and negligible cross section separated by one meter in free space, produces a force of 2 × 10⁻⁷ newtons per meter of length. It is also the current produced in a circuit by 1 volt acting through a resistance of 1 ohm.
