• question_answer
                    For protecting a sensitive equipment from the external magnetic field, it should be:

    A)                 placed inside an aluminium can

    B)                 placed inside an iron can

    C)                 wrapped with insulation around it when passing current through it

    D)                 surrounded with fine copper sheet

    Correct Answer: B

    Solution :

                    Iron is a ferromagnetic substance. There are no magnetic lines of force inside a ferromagnetic substance. So, equipment maybe protected by placing it inside the can made of a ferromagnetic substance. Hence, it is placed inside an iron can.

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