1.

The value of magnetic moment is zero in the case of antiferromagnetic substances because the domains

Answer»

GET oriented in the direction of the applied magnetic field. 
get oriented opposite to the direction of the applied magnetic field.
are oppositely oriented with respect to each other without the application of magnetic field.
cancel out each other's magnetic moment. 

Solution :In ANTIFERROMAGNETIC SUBSTANCES the magnetic moment is zero as the DOMAINS are exactly opposite to each other in absence of magnetic field Ex. : MnO .


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