What difference will you see if an iron bar were suspended in place of the bar magnet?
If an iron bar is suspended in place of the bar magnet, we will observe that there will be attraction for both the poles of the bar magnet.
If an iron bar is placed near a bar magnet then opposite pole appear on an iron bar at near end to bar magnet and similar pole appears on the iron bar at the farther end to the bar magnet.
If you are in a dark empty room and are given two identical bars ( same mass ,same size, same weight and same texture). One of them is a bar magnet and the other one is an iron bar. There is nothing else in the room. You have to come out of the room with the magnet and leave the iron bar behind.
Find a way to identify the magnet bar and the iron bar.