1. Physics I Class 23
The Magnetic Field

2. Magnetism in Ancient Times

3. Peter Peregrinus

4. William Gilbert

5. Magnetic Forces Between Poles “Opposites Attract”

6. Why Is A Magnet Attracted to Some Materials (Refrigerators)?

7. What Happens If You Try to Separate North and South Poles?

8. Magnetic Field Lines

9. Electromagnetism

10. Units of Magnetic Field

11. Class #23 Take-Away Concepts

12. Class #23 Problems of the Day

13. Answer to Problem 1 for Class #23

14. Class #23 Problems of the Day

15. Answer to Problem 2 for Class #23

16. Activity #23 Introduction to Magnetic Fields