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Questions  

In a paramagnetic material 

a
Magnetic  dipole moment of atom is zero
b
Magnetic dipole moments of atom are held together in different domains in rigid parallelism. This is called exchange coupling.
c
Susceptibility is not held by temperature.
d
None of the above statements is correct.

detailed solution

Correct option is D

Atoms of paramagnetic  material have permanent  dipole moments and these elementary dipole moments are oriented at random exchange coupling appears in ferromagnetic material decreases with temperature.

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