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Magnetic ShieldingEffect of Magnetic Material on Field LinesMagnetic materials like iron concentrate the magnetic field lines.
Magnetic ShieldingAs mentioned above, magnetic materials like iron concentrate the magnetic field lines and divert them out from the ends. Using this principle, these magnetic materials can act as magnetic shielding. Magnetic shielding is to prevent surrounding magnetic field lines from reaching the magnetic sensitive equipments (like MRI scanner) whose operation may be affected by the fields.
Note that the iron used here must be a large thin sheet of iron. We cannot use a block of iron to act as magnetic shielding as the iron will become induced magnet and the field lines will pass through it when a block of iron is used.
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