Magnetic Flux

The Magnetic flux Φ through any surface held in a magnetic field b is measured by the total number of magnetic lines of force crossing the surface


where d S = small area element through which line is passing.


The S.I. unit of magnetic flux is weber (Wb). One weber is the amount of magnetic flux crossing over an area of 1 metre2 held normal to a uniform magnetic field of one tesla.

Thus                           1 weber = 1 tesla x 1 m2

The c.g.s. unit of Φ is maxwell (Mx),

where             1 weber = 108 maxwell

Reference: This article is referred from my authored book “electrical engineering materials”.

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