1. Electromagnetism How can you make an electromagnet?
How can you make the electromagnet stronger/weaker?

2. Ways to strengthen a magnetic field
Using a solenoid
Using a electromagnet

3. Solenoid
A coil of wire that produces a magnetic field when carrying an electric current

4. Solenoid
What are two ways could you increase a solenoids’ magnetic field?

5. Solenoid
To increase the strength of the magnetic field, increase the number of loops per meter AND/OR increase the current in the wire

6. Electromagnet Made up of a solenoid wrapped around an iron core
The magnetic field of the solenoid makes the domains inside the iron core line up
The magnetic field in the electromagnet is the field of the solenoid plus the field of the magnetized core
Very useful…can be turned on and off