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Four materials that are attracted by mag...

Four materials that are attracted by magnets

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Knowledge Check

  • .................. observed in ionic crystals which large difference in the size of ions. The substances that are strongly attracted by a magnetic field are called .........

    A
    Frenkel defect, ferromagnetic substances
    B
    Impurity defect, anti-ferromagnetic substances
    C
    Frenkel defect, paramagnetic substances
    D
    Schottky defect, paramagnetic substances

  • 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

  • Assertion: Paramagnetic substances get weakly attracted to a magnet. Reason: They have tedency to from a region of strong magNetic field to weak magnetic Held.

    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 ture but reason is false.
    D
    If both assertion and reason are false.

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    Which materials have negative value of magnetic susceptibility?

    Statement - 1 : Wolframite impurities are separated from cassiterite by electromagnetic separation. And Statement - 2 : Cassiterite being magnetic is attracted by the magnet and forms a separate heap.

    When iron and sulphur are heated together a grey mass is formed which is attracted by a magnet. ………………..

    Assertion (A): Steel is attracted by a magnet Reason (R ): Steel is a magnetic substance

    Two magnetic materials A and B have relative magnetic permeabilities of 0.96 and 500 . Identify the magnetic materials A and B .

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