Which material is best for making a permanent magnet?

Eli.te

3 years ago

The answer is B not C
Cobalt, iron and nickel are basically permanent magnets
But soft iron isn't used because of it's short storage of current between magnets. So soft iron is a temporary magnet .
Steel is just an alloy of carbon and Iron.

But I think the most suitable option is B, cobalt.

Eli.te

4 years ago

The answer is supposed to be Cobalt (B), not Steel (E).

Eli.te

4 years ago

Or there could be double answers
cos steel also have high retensivity, which is also similar to cobalt.