1. 17.2 Electromagnets

2. Electromagnets
Electromagnet: magnet that is created when there is electric current flowing in a wire

3. Examples of Electromagnets

4. Building an Electromagnet
Build an electromagnet from wire and a nail
Wrap the wire in many turns around the nail and connect a battery.
Can you use materials other than iron?

5. Right-Hand Rule
Curl the fingers of your right hand in the direction of the current in an electromagnet
Your thumb will point towards the north pole

6. Right-hand Rule Example
Which way is the electromagnet’s north pole?

7. Another Example
In the figure below, which way is the electromagnet’s north pole?