1. Magnets and ElectromagnetsMagnets and Electromagnets

2. N S
Magnetic fieldsMagnetic fields

3. Attracting and RepellingAttracting and Repelling

4. N S
Magnet:
Solenoid:

5. ElectromagnetsElectromagnets
The strength of an electromagnet can be increased by:
1) Increasing the voltage
2) Increasing the number of coils
3) Inserting an iron core
(The poles can be reversed if you
reverse the direction of the current)

6. Examples of electromagnetsExamples of electromagnets
1. Speaker 2. Relay switch

7. An electric bellAn electric bell