RAJASTHAN PMT Rajasthan - PMT Solved Paper-2002

  • question_answer
    Electromagnets are made of soft iron (because soft iron have :

    A)  low retentivity and high susceptibility

    B)  low retentivity and low susceptibility

    C)  high retentivity and high susceptibility

    D)  high retentivity and low susceptibility

    Correct Answer: A

    Solution :

    Soft iron have low retentivity and high susceptibility, due to low retentivity when current starts to flow then immediately it becomes magnet and as current is off, its magnetism vanishes.


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