1. Magnetic Fields September 30, 2013 October 2, 2013

2. The Force Between Two Bar Magnets

3. Origins of Magnetism

4. Magnetic Domains

5. What would happen if you cut the magnet in half (between the north and south poles)? Inside Permanent Magnets (and Ferromagnetic Materials)

6. Magnets Always Have Two Poles

7. Magnetic Field of a Bar Magnet

8. Thought Questions Do you notice anything strange about the direction of the field lines? Which way does the compass point? Draw field lines for the Earth’s magnetic field.

9. Magnetic Field of the Earth

10. Magnetic Field Lines Using Iron Filings

11. Continuity of Field Lines

12. Magnetic Field produced by a Current-Carrying Wire

13. Direction for 3-D in 2-D

14. Which way does the current flow?

15. Where is the magnetic field strength the greatest?

16. The Solenoid

17. Effects of Magnetic Fields on Charged Particles

18. The Magnetic Force for Positive and Negative Charges

19. The Magnetic Force on a Moving Charged Particle

20. What Direction is the Force?

21. What are the Different Charges?

22. Differences Between Motion in Electric and Magnetic Fields

23. Circular Motion in a Magnetic Field

24. Magnetic Force on a Current- Carrying Wire

25. The Magnetic Force on a Current- Carrying Wire

26. The Magnetic Force Between Current-Carrying Wires

28. Group Discussion Walker, Chapter 22 (pp. 742-743) Conceptual Questions: –Questions 2-10 and 17-21 Groups of three: –“Concept artist” to draw fields –“Recorder” to record answer & explanation –“Reporter” to report findings at the end of class

29. Applications of Magnetic Fields The Mass Spectrometer Velocity Selectors / CRTs Magnetic Levity

30. Motion in a Magnetic Field

31. Helical Motion in a Magnetic Field

32. Uranium Separation Using a Mass Spectrometer

33. Velocity Selectors

34. Cathode Ray Tube

35. Magnetic Levity

36. Magnetic Trains