The diagram shows a wire coil wound around a soft-iron rod. As shown, the wire is attached to a d.c. power supply. The apparatus is situated in a region completely shielded from the Earth’s magnetic field. A small compass needle is placed at point P. In what direction does the N pole of the compass needle point?
- Atowards the bottom of the page
- Btowards the left of the page
- Ctowards the right of the page
- Dtowards the top of the page