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Q.

Assertion: Ferrites like MgFe2O4 and ZnFe2O4 are weakly attracted by magneticfield as compared to ferromagnetic substances.

Reason: In ferromagnetic substances, the magnetic moments of the domains are oppositely oriented and net magnetic moment is zero.

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a

Assertion is false, Reason is true.

b

Assertion and Reason are true. Reason is correct explanation of Assertion.

c

Assertion and Reason are true. Reason is not the correct explanation of Assertion.

d

Assertion is true, Reason is false.

answer is C.

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Detailed Solution

In ferrimagenetic substance (eg. Ferrites like MgFe2O4 and ZnFe2O4), the magnetic moment of the domains aligns in such a way that there is a small net magnetic moment due to which these substances are weakly attracted by magnetic filed.

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