- If battery in an electromagnet is active then the nail in the electromagnet will become magnetic
- The student connects the wire wrapping an iron nail to a battery
- So, the iron nail will become magnetic

- The iron nail will become magnetic
- A nail is a kind of object
- Magnetic attraction pulls two objects together
- Hence, the iron nail will attract another iron nail because the iron nail is magnetic

So, the iron nail will attract another iron nail because the iron nail is magnetic
Question: A student wraps a wire around an iron nail. The student then connects the wire to a battery. The nail attracts another nail and they stick together. What force holds the two nails together?
Context: - A nail is a kind of object 
- Magnetic attraction pulls two objects together 
- If battery in an electromagnet is active then the nail in the electromagnet will become magnetic 
- The student connects the wire wrapping an iron nail to a battery