Which of the following, the most suitable material for making permanent magnet is
Correct answer: D. Nickel
- A. Aluminium
- B. Bismuth
- C. Copper
- D. Nickel
Explanation
The correct answer is Nickel. Nickel is a ferromagnetic material, which means it can be magnetised and retain its magnetisation over time, making it an excellent choice for creating permanent magnets. In contrast, Aluminium, Bismuth, and Copper are not suitable for making permanent magnets. Aluminium and Copper are non-magnetic materials, while Bismuth exhibits diamagnetism, which means it actually repels magnetic fields and cannot retain magnetisation.
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