Which one of the following is not ferromagnetic materials?
Correct answer: C. Cu (Copper)
- A. Ni (Nickel)
- B. Co (Cobalt)
- C. Cu (Copper)
- D. All of these
Explanation
Ferromagnetic materials are those that have strong magnetic properties, such as being strongly attracted to magnets and retaining magnetisation. Nickel (Ni) and Cobalt (Co) are common examples of ferromagnetic materials. On the other hand, Copper (Cu) is not ferromagnetic; it is diamagnetic, which means it does not retain magnetic properties and is slightly repelled by magnetic fields. Therefore, the correct answer is Copper (Cu), as it does not exhibit ferromagnetic characteristics.
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About Physics of Solids
Solids are compared through crystal structure, amorphous arrangement, elasticity, plastic deformation, stress, strain and Young’s modulus. Electrical behavior depends on available charge carriers and band structure, so conductors, insulators and semiconductors must be distinguished from mechanical properties such as strength, stiffness and brittleness.
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