1. Can an ordinary nail be a magnet?

2. Wire wrapped around nail
Paperclips attracted to the nail
Nail
How attractive!

3. A temporary magnet produced by an electric current
Electromagnet
A temporary magnet produced by an electric current
Magnetic Field
Current running around magnet
(Wire not in this drawing!)
No Current
Strength of Electromagnet depends upon:
1. The size of the iron core
Larger core = Stronger electromagnet
2. The number of turns of wire around the core
More turns = Stronger electromagnet

4. Common Electromagnets You Used Every Day

5. Which is stronger??? A B

6. Which is stronger??? A B