1. Please come to the front of the lecture hall to see the demonstrations.

2. Please be Seated

3. from Lecture-Demonstration Now on a two-DVD set: The classic four-hour video collection: Demonstrations in Acoustics for only $20. $10 discount for direct cash sales. Inquire in front after program. Dr. Richard E. Berg, demonstrating over 70 experiments, in 29 titled segments, covering vibrations, waves and sound.

4. 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. Link to: SUMMER AND OTHER PROGRAMS FPR PRE-COLLEGE STUDENTS http://www.physics.umd.edu/lecdem/outreach/summerprogs.htm SUMMER AND OTHER PROGRAMS FPR PRE-COLLEGE STUDENTS

6. Electricity and Magnetism Physics is Phun January 2009

7. Topics: Electrostatics Magnetostatics Laws of Electromagnetism

8. Electrostatics

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

11. Siphon Quantum mechanical tunneling “Triboelectricity”

13. Charging by Induction

14. Polarization in the Atom Electric forces on polar molecule Polar and Non-Polar LiquidsPolar and Non-Polar Liquids (a) and (b)(a) (b) Electrostatic Force – Moving Lumber

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

16. Lightning (1)

17. Lightning (2)

18. Lightning (3)

19. Lightning (4)

20. Lightning (5)

21. Lightning (6)

22. Lightning Video Lightning Video compliments of Tom A. Warner, ztresearch.com 640x480 pixels 7,200 images per second 0.15 seconds recording time Visual aspects: -stepped leaders -dart leaders -return strokes -continuing current

23. Lightning Rod Simulator Lightning striking the Empire State Building

24. Magnetostatics

25. Lodestone

26. Magnet and Magnetic Field

27. Broken Magnet

28. Relations between electricity and magnetism

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

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

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

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

40. Magnets dropped through tube

41. Magnetic Levitation

42. 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

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

44. Electromagnetic Can Crusher Video 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

45. Cyclotron Dee discharge

46. Cyclotron ion source

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