1. Please be Seated

2. New from Lecture-Demonstration Art Exhibit: Perception and Illusion: The Physics of Light and Optics Union Gallery, 1 st Floor, Stamp Student Union Continuing through February 4, 2005 Gallery hours: Monday-Saturday, 10:00 AM – 8:00 PM Guided tours by Prof. Berg: each Wednesday at12:30 PM

3. New from Lecture-Demonstration Now on a two-DVD set: The classic four-hour video collection: Demonstrations in Acoustics for only $20. Discount for direct cash Sales. Inquire in front. Dr. Richard E. Berg, demonstrating over 70 experiments, in 29 titled segments, covering vibrations, waves and sound.

4. New Physics is Phun e-mail list Go to the Physics is Phun web site and click on “mailing list” link near top of page

5. Electricity and Magnetism Physics is Phun January 2005

6. Topics: Electrostatics Magnetostatics Laws of Electromagnetism

7. Electrostatics

9. Pity the poor neutron; he thought he was a proton but he wasn’t positive.

10. Siphon Quantum mechanical tunneling “Triboelectricity”

12. Charging by Induction

13. Polarization in the Atom Electric forces on polar molecule

14. Van de Graaff electrostatic generator: simulates lightning from cloud to ground

15. Lightning (1)

16. Lightning (2)

17. Lightning (3)

18. Lightning (4)

19. Lightning (5)

20. Lightning (6)

21. Lightning Rod Simulator Lightning striking the Empire State Building

22. Magnetostatics

23. Lodestone

24. Magnet and Magnetic Field

25. Broken Magnet

26. Relations between electricity and magnetism

27. Ampere’s Law: Electric currents create magnetic fields.

30. Lorentz Force: Charges moving in a magnetic field experience an electromagnetic force.

33. Faraday’s Law of Induction: A changing magnetic field creates an electric field.

36. Lenz’s Law: Induced electric currents act so as to oppose the motion that caused them.

38. Magnets dropped through tube

39. Magnetic Levitation

40. Train Levitation Magnetic Levitation Trains Photographs compliments of: High Speed Rail (HSR), by Oliver Keating http://www.o-keating.com/hsr/ Yamanashi test line Maglev site in Japan

41. Maglev Train “Tracks” Train moving on Guideway at 500 mph The Yamanashi Guideway for the MLX01

42. Electromagnetic Can Crusher 1. Slow motion view 2. Diagram showing explanation a. current from capacitor creates magnetic field b. increasing magnetic field induces electric field c. electric field moves electrons around can d. electrons feel inward and separation forces e. can cut in two and pushed apart Slow motion of can crusher at Weslyan University Compliments of Vacek Miglus

43. Cyclotron Dee discharge

44. Cyclotron ion source

45. We are on the web at http://www.physics.umd.edu/lecdem/ Animated Gifs compliments of bellsnwhistles.com The End See you in March!