JAMB - Physics (2025 - No. 77)
The commonly used materials for shielding or screening magnetism is
Alumumium
Brass
Soft iron
Copper
Explication
Soft iron has high magnetic permeability, so it easily attracts and redirects magnetic field lines, shielding areas from external magnetic fields. Aluminum, brass, and copper do not have this property and are ineffective for magnetic shielding.