| ASSERTION: Ferromagnetic substances become paramagnetic above curie temp. |
| REASON: Domains are destroyed at high temperature. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true and reason is not the correct explanation of assertion.
C) If assertion is true but reason is false.
D) If both assertion and reason are false.
E) If assertion is false but reason is true.
Correct Answer: A
Solution :
From Curie Weiss law where the susceptibility \[\chi =\frac{c}{\left( T-{{T}_{C}} \right)}\]. If the temperature rises above the Curie temperature \[{{T}_{c}}\], ferromagnetic materials become paramagnetic materials because the domains get destroyed as started.
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