Each of the two bars has one labelled end, X or Y, as shown. The X end of bar 1 is first moved near the N-pole and then near the S-pole of a magnet. The Y end of bar 2 is first moved near the N-pole and then near the S-pole of the magnet. The table gives the observations. What materials are bar 1 and bar 2 made of?
- Abar 1: copper; bar 2: iron
- Bbar 1: iron; bar 2: steel
- Cbar 1: steel; bar 2: copper
- Dbar 1: steel; bar 2: iron