A student studies a permanent magnet by hanging paper clips from the magnet, as shown. Which statement is correct?
- AEach paper clip has an S-pole at the top and an N-pole at the bottom when suspended from the permanent magnet.
- BIf the paper clips are made of soft iron they become demagnetised when the permanent magnet is removed.
- CIf the paper clips are made of steel they become demagnetised when the permanent magnet is removed.
- DMore paper clips can be suspended from the N-pole.