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Magnetic attract magnetic substances such as iron, nickel, cobalt, etc. They can only repel:

Magnetic attract magnetic substances such as iron, nickel, cobalt, etc. They can only repel: Correct Answer Diamagnetic substances

CONCEPT:

Ferromagnetic substances:

  • Ferromagnetic substances are those which develop strong magnetization in the direction of the magnetizing field.
  • They are strongly attracted by a magnet and tend to move from the weaker to the stronger part of a magnetic field.
  • Magnetic susceptibility is very large and positive i.e. χ > 1000
  • Example: Iron, cobalt, nickel, gadolinium, and alloys like alnico.

Paramagnetic substances:

  • Paramagnetic substances are those which develop feeble magnetization in the direction of the magnetizing field.
  • Such substances are feebly attracted by magnets and tend to move from weaker to stronger parts of a magnetic field.
  • Magnetic susceptibility is small and positive i.e. 0 <  χ. Therefore option 1 is correct.
  • Example: Manganese, aluminum, chromium, platinum, etc.

Diamagnetic substances:

  • Diamagnetic substances are those which develop feeble magnetization in the opposite direction of the magnetizing field.
  • Such substances are feebly repelled by magnets and tend to move from stronger to weaker parts of a magnetic field.
  • Magnetic susceptibility is small and negative i.e. -1 ≤  χ ≤ 0. Therefore option 3 is correct.
  • Examples: Bismuth, copper, lead, zinc, etc.

EXPLANATION:

  • From the above, it is clear that magnet attracts magnetic substances such as iron, nickel, cobalt, etc and they can only be repelled by the diamagnetic substances. Therefore option  3 is correct.

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