Question 146Electricity & Electronics - Assistant Engineer

The correct answer is D) Soft iron. Soft iron has the highest permeability, which means it allows magnetic fields to pass through it most easily compared to the other materials listed. This is because soft iron has a crystalline structure that allows the magnetic domains within the material to align easily when placed in a magnetic field, resulting in high magnetic permeability. The other materials, such as Bakelite (a type of plastic), glass, and aluminum, do not have the same magnetic properties as soft iron and would exhibit much lower permeability when placed in a magnetic field.