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 at 3.5 V battery and a 6 V battery which list of materials would allow you to make the strongest electromagnet? A. Glass rod copper wire 6 volt battery. B. Wooden pencil, string 3.5 V battery.C. Iron copper wire 6 V battery.D. Arnel copper wire 3.5 V battery.
The correct answer is option C: Iron, copper wire, and a 6V battery.
To make an electromagnet, you need a ferromagnetic material (such as iron) as the core, a coil of wire (such as copper wire) around the core, and a power source (such as a battery) to create an electric current flowing through the wire. The combination of iron, copper wire, and a 6V battery would provide the necessary materials to create the strongest electromagnet.