In Diagram 1, a wire carrying an electric current is directed into the page. The wire lies between the poles of a magnet. A force acts on the wire, pointing down towards the bottom of the page. In Diagram 2, the current has been reversed and the magnet has been rotated through $90^\circ$. After these changes, which direction does the force act in?
- Atowards the top of the page
- Btowards the bottom of the page
- Ctowards the left-hand side of the page
- Dtowards the right-hand side of the page