Electromagnet

Materials

1. Insulated wire (about 1 m in length)
2. Iron nail (at least 5 cm in length)
3. 1.5 V battery
4. Adhesive tape
5. Small metal paper clip

Procedure

1. Test that the iron nail is not already magnetised by trying to pick up the metal paper clip with it.
2. Strip the two ends of the wire off its insulation. Leave about 1 cm bare on each end.
3. Coil the wire around the iron nail, pushing each coil tightly together, to make a solenoid. Make sure you leave about 5 cm free at each end of the wire in order to connect the battery to the solenoid.
4. If there is excess wire, make a second layer of coils around the first layer.
5. Connect the ends of the wire to the terminals of the battery.
6. Test the solenoid now by picking up the paper clip.