Assertion:Iron, cobalt, nickel and `CrO_2` are called ferromagnetic substances . Reason:Ferromagnetic substances are weakly attracted by magnetic fiel
Assertion:Iron, cobalt, nickel and `CrO_2` are called ferromagnetic substances .
Reason:Ferromagnetic substances are weakly attracted by magnetic field
A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If both assertion and reason are true but 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
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Correct Answer - C
Ferromagnetic substances are strongly attracted by magnetic field and they can be permanently magnetised.
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