everyday science MCQ #5304

Why are shields made of iron usually provided around precision instruments?

everyday science MCQ #5304

  1. Question 1

    Q1. Why are shields made of iron usually provided around precision instruments?

    • A) For protection against the effect of external magnetic fields
    • B) For guarding the instruments against unauthorized handling
    • C) For protection against the effect of moisture in the air
    • D) For absorbing heat generated during the functioning of the instrument

    Answer: For protection against the effect of external magnetic fields

    Explanation: Iron shields work by magnetic shielding — the high permeability of iron redirects external magnetic field lines through itself rather than allowing them to penetrate the enclosed space.