Q.

If the susceptibility of dia, para and ferromagnetic materials are χd, χp, χf  respectively, then

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a

χd < χp< χf
 

b

χd < XF< χp

c

 χf < χd < χp

d

χf < χp < χd

answer is A.

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Detailed Solution

For diamagnetic substance, χd is small and negative (10-5).
For paramagnetic substances, χp is small and positive (10-3 to 10-5).
For ferromagnetic substances, χf is very large (103 to 105).

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