Civil Engineering - Building Materials - Discussion

31. 

Permanent magnets are made of high carbon steel and

[A]. 15% of cobalt
[B]. 20% of cobalt
[C]. 35% of cobalt
[D]. 45% of cobalt.

Answer: Option D

Explanation:

No answer description available for this question.

Gowri said: (Feb 2, 2018)  
Where are permanent magnets used?

Akshay said: (May 29, 2018)  
What is cobalts?

Please explain it.

Alpesh Mali said: (Feb 26, 2019)  
Please anyone explain.

Dhr said: (Apr 19, 2020)  
Permanent magnets are materials where the magnetic field is generated by the internal structure of the material itself. Inside atoms and crystals you have both electrons and the nucleus of the atom.

Teja said: (Sep 4, 2020)  
Thanks @Dhr.

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