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Q.

Statement - I : On heating ferromagnetic or ferrimagnetic substances become paramagnetic.
Statement - II : On heating randomization of magnetic domains occurs.

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a

Both statements I and II are correct

b

Statement-I is correct and statement-II is incorrect

c

Statement-I is incorrect and statement-II is correct

d

Both statements I and II are incorrect

answer is A.

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Detailed Solution

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  • Ferrimagnetic substances lose ferrimagnetism on heating and become paramagnetic. 
  • In ferromagnetic substance, domains are aligned in parallel and antiparallel direction in unequal numbers. 
  • In ferromagnetic substances, all the domains get oriented in the direction of magnetic field and remain as such even after removing magnetic field.
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