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5. Magnetism and matter — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics5. Magnetism and matter1 Mark
MCQ
For protecting a sensitive equipment from the external magnetic field, it should be
  • A
    Placed inside an aluminium cane
  • ✓
    Placed inside an iron cane
  • C
    Wrapped with insulation around it when passing current through it
  • D
    Surrounded with fine copper sheet
✓

Answer

Correct option: B.
Placed inside an iron cane
b
Iron is a ferromagnetic substance, so there are no magnetic lines of force inside it. So to protect the sensitive equipment from external magnetic field, it should be placed inside an iron can.

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