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Standard XII
Physics
Ferromagnetism
Question

Three identical bars A, B and C are made of different magnetic materials. When kept in a uniform magnetic field, the field lines around them look as given in the figure . Make the correspondence of these bars with their material being diamagnetic (D), ferromagnetic (F) and paramagnetic (P) .
99262.png
  1. A↔F,B↔D,C↔P
  2. A↔D,B↔P,C↔F
  3. A↔F,B↔P,C↔D
  4. A↔P,B↔F,C↔D

A
A↔F,B↔P,C↔D
B
A↔F,B↔D,C↔P
C
A↔D,B↔P,C↔F
D
A↔P,B↔F,C↔D
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Solution
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Magnet A is allowing all the field lines passing through it , therefore it is ferromagnetic.
Magnet B is repelling the field lines therefore it is diamagnet.
Magnet C is attracting the field lines therefore it is paramagnet.

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