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Q.

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 follows:

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Make the correspondence of these bars with their material being diamagnetic (D), ferromagnetic (F) and paramagnetic (P):

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a

AD,BP,CF

b

AF,BP,CD

c

AP,BF,CD

d

AF,BD,CP

answer is B.

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Detailed Solution

Permeability of ferromagnetic materials is large and that of ferro magnetic materials is small but positive.

For dia magnetic materials permeability is negative.

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