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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