Let us suppose that there is a block of a ferromagnetic material inside a very long ideal solenoid,

Amappyaccon22j7e

Amappyaccon22j7e

Answered question

2022-05-18

Let us suppose that there is a block of a ferromagnetic material inside a very long ideal solenoid, the magnetic field lines inside are in a straight line perpendicular to the surface of the block at both the ends.Why does the magnetic field inside the block increases? It is known form the boundary conditions of magnetic fields that the perpendicular or the normal component of the magnetic field B doesn't change when it goes from one medium to other.So, what's happening here?

Answer & Explanation

Calvin Oneill

Calvin Oneill

Beginner2022-05-19Added 20 answers

The field from the solenoid would cause an alignment of the atomic magnetic dipoles within the ferromagnetic material. This would be equivalent to putting a bar magnet inside the solenoid. The resultant field would be the vector sum of the two at each point. The field would not change immediately upon leaving the end of the bar, but the contribution from the bar would start to spread (and curve back around to the other end). At some distance from the bar the field of the solenoid would predominate.

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