How do you make a powerful electromagnet with a 12 or 9 volt battery?

Answer 1

You need 3 main things: An iron core, a roll of insulated copper wire and your source of electricity

Firstly find a suitable iron core a iron nail will do (6in 15cm) next wrap the wire (thicker is better) as neatly and tightly as you can around the iron nail.

Once the iron is wrapped up tight make sure you have a piece of copper wire comin off each end one where you began the other where you finished wrapping.

Now all you need to do is connect it to your battery which terminal you connect each wire will determine current flow.

The power of your electromagnet will depend on the wrapping of copperbut mainly the battery and the current it puts out to great a current will heat the wire quickly but a 9 or 12v battery should be fine.