Magnetic Material

A magnetic material is a substance that possesses magnetic properties. These properties arise due to the alignment of magnetic moments, which are the tiny magnets within the electrons of the material.

Iron

Iron is a magnetic material because it has a high magnetic susceptibility, meaning it can be magnetized easily. When iron is exposed to a magnetic field, the magnetic moments within the material align, causing the iron to become magnetized. This property makes iron useful in many applications, including in the manufacture of electrical devices and in the construction industry.

Copper, Aluminium, and Silver

Copper, aluminium, and silver are not magnetic materials. Copper and silver have low magnetic susceptibility, and aluminium has virtually no magnetic properties. These materials cannot be magnetized easily, and they are not used in applications that require magnetic properties.

Conclusion

In conclusion, the correct answer to the question "Which is a magnetic material?" is option 'B', Iron. Iron possesses magnetic properties due to the alignment of magnetic moments within the material, making it useful in many applications. Copper, aluminium, and silver, on the other hand, are not magnetic materials and cannot be magnetized easily.

Iron