Question

Consider the given statements with respect to the figure showing a bar of diamagnetic material placed in an external magnetic field.
I. The field lines are repelled or expelled and the field inside the material is reduced.
II. When placed in a non-uniform magnetic field, the bar will tend to move from high to low field.
III. Reduction in the field inside the material slight, being one part in $10^5$.
IV. The field lines gets concentrated inside the material and the field inside is enhanced.

Which of the above statements are correct?

• A. I, II and IV
• B. I, III and IV
• C. II, III and IV
• D. I, II and III

Answer 1

Answer: (D)

Figure shows a bar of diamagnetic material placed in an external magnetic field.

The field lines are repelled or expelled and the field inside the material is reduced, this reduction is slight, being one part in $10^5$. When placed in a non-uniform magnetic field, the bar will tend to move from high to low field.