At position 1, one end of a rod attracts the N-pole of a bar magnet. At position 2, the same end of the rod attracts the S-pole of the bar magnet. What material is the rod made of, and what pole is at end P of the rod in position 1?
- Airon, N-pole
- Biron, S-pole
- Csteel, N-pole
- Dsteel, S-pole