1. Physics I Class 22
The Magnetic Field

2. Magnetism in Ancient Times

3. Chinese Voyages of Exploration Admiral Zheng He (1371-1435)

4. Peter Peregrinus

5. William Gilbert

6. Magnetic Forces Between Poles “Opposites Attract”

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

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

9. Magnetic Field Lines

10. Electromagnetism

11. Units of Magnetic Field

12. Class #22 Take-Away Concepts

13. Class #22 Problems of the Day

14. Answer to Problem 1 for Class #22

15. Class #22 Problems of the Day

16. Answer to Problem 2 for Class #22

17. Activity #22 Introduction to Magnetic Fields