on a table there is a collection of materials including an iron nail a wooden pencil a glass rod a piece of copper wire a piece of string a 3.5 volt battery and a 6-volt battery which list of materials would allow you to make the strongest electromagnet
To make the strongest electromagnet, you would need a material with high magnetic permeability, a conducting material, and a power source. Based on the provided list of materials, the following combination would be suitable:
1. Iron nail: It is a ferromagnetic material with high magnetic permeability, making it ideal for creating a strong magnetic field.
2. Copper wire: It is a good conductor of electricity. You could wrap the wire around the nail to create a coil, which enhances the magnetic field strength.
3. 6-volt battery: A higher voltage power source would generate more current flow through the coil, resulting in a stronger magnetic field.
Therefore, the list of materials that would allow you to make the strongest electromagnet would consist of an iron nail, a piece of copper wire, and a 6-volt battery.