Understanding Ampere-Turns (AT) - The Unit of Magnetic Flux Measurement

Ampere-turn (AT) is a unit of measurement used to express the magnetic flux in a circuit. It is defined as the product of the current in amperes (A) and the number of turns of the coil in which the current flows.

In other words, if you have a coil with N turns and a current of I amperes flowing through it, the magnetic flux produced by the coil is given by the equation:

Φ = N x I (in AT)

where Φ is the magnetic flux in webers (Wb), N is the number of turns of the coil, and I is the current in amperes.

The unit of ampere-turn is used to describe the magnetic properties of materials and devices, such as the inductance of a coil or the magnetic field strength around a magnet. It is a useful unit for comparing the magnetic properties of different materials and devices, as it takes into account both the current flowing through the device and the number of turns of the coil.