Question

Why we should use hard magnetic material for permanent magnets​

Answer 1

Answer:

These materials are really hard in the basis that it is very difficult to get magnetised. The reason is that the domain walls are motionless owing to crystal defects and imperfections. But if it gets magnetised, it will be permanently magnetised. That is why; it is also called as permanent magnetic material

Explanation:

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Answer 2

Answer:

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