- #1
AlonsoMcLaren
- 90
- 2
A really basic question: since room temperature (300K) is much lower than the Curie point of iron (1043K), the spins in an iron bar at room temperature should be lined up even when the external magnetic field B=0
Then why can't we use any iron bar as magnet? Instead we have to rub the iron bar against a magnet to make the iron bar into a magnet?
Then why can't we use any iron bar as magnet? Instead we have to rub the iron bar against a magnet to make the iron bar into a magnet?