The magnetic field at a given point is specified by both a direction and a magnitude and is described by magnetic field intensity, .
The magnetic field intensity, , at any point is defined as the force experienced by a north pole of one weber placed at that point. In other words, it is defined as the magnetomotive force per unit length produced by the steady current in a magnetic circuit.
Its unit is newtons per weber (N/Wb) or amperes per metre (A/m) or ampere-turns per metre (AT/m).
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