Q. 39
The value of magnetic moment is zero in the case of antiferromagnetic substances because the domains ________.
A. get oriented in the direction of the applied magnetic field.
B. get oriented opposite to the direction of the applied magnetic field.
C. are oppositely oriented with respect to each other without the application of magnetic field.
D. cancel out each other’s magnetic moment.
Answer :
Antiferromagnetic substances are solids which show domain structure similar to ferromagnetic substances but these domains are oppositely oriented, canceling out each other’s magnetic moment. They do not get oriented by the magnetic field because they are unaffected by it. Hence (iii) and (iv) are correct.
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