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Railways General Science & Technology Magnetism Sample Paper Magnetism Sample Test Paper-11

  • question_answer
    In a cassette player, materials used for coating magnetic tapes are

    A)  Cobalt 

    B)  \[CoF{{e}_{2}}{{O}_{4}}\]

    C)  \[NiF{{e}_{2}}{{O}_{4}}\]     

    D)  Nickel

    Correct Answer: C

    Solution :

    [c] Ferrites; e.g. CoFe2 O4 and NiFe2 O4 are used for coating magnetic tapes.


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