Physics · May / June 2019 · Paper 12 · Question 31

One end of each of two bars is marked with an X or a Y, as shown. End X of bar 1 is brought close to the N-pole and then to the S-pole of a magnet. End Y of bar 2 is brought close to the N-pole and then to the S-pole of the magnet. The table shows what happens. | | end X of bar 1 | end Y of bar 2 | |---|---|---| | N-pole of magnet | attracted | attracted | | S-pole of magnet | attracted | repelled | What materials are bar 1 and bar 2 made from?

1. Abar 1: copper, bar 2: iron
2. Bbar 1: iron, bar 2: steel
3. Cbar 1: steel, bar 2: copper
4. Dbar 1: steel, bar 2: iron

As printed in the paper