12th Class Physics Sample Paper Physics Sample Paper-15

  • question_answer
    Subhankar was making an electric bell. For that, he was looking for an appropriate material. Subham suggested him to use soft iron for this purpose and helped him in making electromagnet.
    (i) What quality do you think is there in Subham?
    (ii) Why Subham suggested for soft iron?


    (i) Friendly and helping nature.
    (ii) Any material having high permeability and low retentivity is suitable for making electromagnets (temporary). So, in electric bell, we use soft iron for making electromagnet.

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