A bar magnet is set on a sheet of paper. The diagram displays the magnetic field lines produced by the magnet. A soft-iron bar is then placed on the paper along the rectangle labelled WZ. The soft-iron bar is magnetised by induction. What magnetic poles appear at the two ends of the soft-iron bar?
- Apole at W: N; pole at Z: N
- Bpole at W: N; pole at Z: S
- Cpole at W: S; pole at Z: N
- Dpole at W: S; pole at Z: S