Magnetic Flux
Magnetic flux is the product of the average
magnetic field times the perpendicular area that it penetrates. It is a quantity
of convenience in the statement of Faraday's Law and in the discussion of
objects like transformers and solenoids. In the case of an electric generator
where the magnetic field penetrates a rotating coil, the area used in defining
the flux is the projection of the coil area onto the plane perpendicular to the
magnetic field.
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