if a magnetic material such as soft iron is placed in the flux path surrounding a permanentagnet there will be increase in the flux density
Answers
Answer:
Magnetic Flux Density is amount of magnetic flux through unit area taken perpendicular to direction of magnetic flux. Flux Density (B) is related to Magnetic Field (H) by B=μH. It is measured in Webers per square meter equivalent to Teslas [T].
The total number of magnetic field lines passing through a given area normally is called magnetic flux. In magnetic flux formula μ is the permeability of the medium (material) where we are measuring the fields. The B field is a vector field, which means it has a magnitude and direction at each point in space
Answer:
Flux density increases beacause of the magnetisation of the soft iron as soft iron is a ferromagnetic substance.
Explanation:
Ferromagnetic substance
Ferromagnetic substance is the substance that attaracts strongly to the magnetic field applied. It contains domains. Domain is a magnetised space in a ferromagnetic substance that is magnetised in a particular direction. Net magnetic field from the substance is zero. But when the field is applied all the substance get magnetized and produces its own magnetic flux.
Here, soft iron is ferromagnetic substance. When magnetic field is applied then all the domains of soft iron points toward the direction of field and creates magnetic flux. So, net magnetic flux is given by
B = B' + M
where B is flux density in substance, B' is flux density in vaccum and M is magnetisation. B' is magnetic flux density of permanent magnet in the question.
It is this magnetisation M that increases the flux density.