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(A) Magnetic shielding is achieved by enclosing the sensitive instrument within a shell made of a material with high magnetic permeability,such as sof

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soft ferromagnetic substance (soft iron).

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(A) Magnetic shielding is achieved by enclosing the sensitive instrument within a shell made of a material with high magnetic permeability,such as soft iron. When an external magnetic field is applied,the magnetic field lines prefer to pass through the high-permeability material rather than the air or the interior space. This effectively diverts the magnetic flux around the protected region,thereby shielding the instrument from the external magnetic field.

Magnetic shielding is done by surrounding the instrument to be protected from magnetic field by

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