What you need:
• Insulated copper wire with ends stripped
• Large iron nail
• Small paper clips or staples
2. Try the experiment again with more wire wrapped around the nail. Can you pick up more paper clips? What happens if you use a bigger nail? A nail made of a different material?
An electromagnet is a magnet that can be turned on and off. In this experiment, the battery is a source of electrons. When you connect the wire to the battery, the electrons flow through the wire. If there is not a complete circuit, the electrons will not flow. Electrons behave like little magnets and when they flow through a wire, they create a magnetic field, which turns the nail into a magnet that can pick up paper clips and staples!