Dave455
Well-known member
I thought 'soft' magnets are metals that can be easily magnetized and demagnetized like screwdriver tips. Are there metals that stick to magnets without becoming magnetized?
I should have listened more at school.
Well, I’m using compass terminology, which is a bit specialised.
If your screwdriver was put in a magnetic field, say close to a magneto, and it retained some magnetism when the magneto was earthed, then that’s “hard iron”.
If your screwdriver was inserted into the same field, and developed some magnetism again, but this time lost the magnetism when the magneto was earthed, then that’s “soft iron”!
This isn’t something most people need to know...!




