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NEET PHYSICSEasy

If a diamagnetic substance is brought near the north or the south pole of a bar magnet, it is

A

repelled by both the poles

B

repelled by the north pole and attracted by the south pole

C

attracted by the north pole and repelled by the south pole

D

attracted by both the poles

Step-by-Step Solution

  1. Definition: Diamagnetic substances are those that have a tendency to move from the stronger to the weaker part of an external magnetic field .
  2. Interaction: Unlike ferromagnetic materials which are attracted, diamagnetic substances are feebly repelled by a magnet. This repulsion occurs regardless of the polarity of the magnetic field because the induced magnetic moment in a diamagnet is always directed opposite to the external field (Lenz's Law analog for atomic orbitals) .
  3. Conclusion: Since the magnetic field is strong near both the North and South poles of a bar magnet, a diamagnetic substance will be repelled by the strong field at both poles.
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