Question

Which of the following is used for making magnets?

• A. Duralumin
• B. Magnalium
• C. Bronze
• D. Alnico

Answer 1

The correct option is D Alnico

1) Alnico alloys are ferromagnetic, with high coercivity (resistance to loss of magnetism) and are used to make permanent magnets.

2) Before the development of rare-earth magnets in the 1970s, they were the strongest type of permanent magnet.

3) It composed primarily of aluminium $\left(Al\right)$, nickel $\left(Ni\right)$ and cobalt $\left(Co\right)$, hence $al-ni-co$.