How do we know which end of a magnet is North?

Question

Is there like a “standard” that it’s compared to or???

In: 21

Answer 1

Yes, it could be compared to a “standard”

That “standard” though would Just be, like someone else commented, any magnet with a known alignment.

We can use the earths magnetic field, since ww know its direction. Thats probably what they do in factories where they label magnets.

We could also get a magnet with a known alignment with an electromagnet; we know the direction of the current through our electromagnet, so we know the direction of north and south in our electromagnet (current creates the magnetic field, and so Current direction determines the field direction)