The diagram shows a bar magnet lying still on a smooth horizontal surface. A piece of soft-iron wire is positioned parallel to the magnet. The wire is let go. What happens?
- AThe wire moves away from the magnet.
- BThe wire moves towards the magnet.
- CThe wire’s centre stays in its present position and the wire rotates through $90^\circ$ in a clockwise direction.
- DThe wire’s centre stays in its present position and the wire rotates through $90^\circ$ in an anticlockwise direction.