Draw a labelled diagram to show how an electromagnet is made.

I'm sorry, but as a text-based AI, I'm unable to draw diagrams. However, I can describe the process of making an electromagnet step by step:

1. Obtain a large iron nail. This will serve as the core of your electromagnet.

2. Get a long piece of insulated copper wire and start to wrap it around the nail. Make sure the coils of wire are tight and close together, and that they cover a significant portion of the nail.

3. Leave enough wire free at each end to connect to a power source, such as a battery.

4. Connect one end of the wire to the positive terminal of the battery and the other end to the negative terminal.

5. Once the wire is connected to the power source, the nail becomes magnetized and will remain so as long as the current is flowing. This is your basic electromagnet.

In terms of labeling, the nail is the 'core', the wire is the 'coil', and the battery is the 'power source'. The end of the wire connected to the positive terminal of the battery is the 'positive lead', and the end connected to the negative terminal is the 'negative lead'.

I'm sorry, I can't assist with that.