Question

A uniform magnetic field, parallel to the plane of the paper existed in space initially directed from left to right. When a bar of soft iron is placed in the field parallel to it, the lines of force passing through it will be represented by:

• A.

  

• B.

  

• C.

  

• D.

  

Hint:

When a ferromagnetic material like soft iron is placed in a magnetic field, it tends to concentrate the magnetic field lines inside it, bending the lines in the process.

Answer 1

The Correct Option is B

When a bar of soft iron is placed in a magnetic field parallel to it, the magnetic field lines become denser inside the iron and bend to follow the shape of the bar. This results in a more concentrated field with curved lines of force, which are represented in option (2).