Please be Seated
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Transcript of Please be Seated
Pleasebe
Seated
New from Lecture-Demonstration
Art Exhibit: Perception and Illusion:The Physics of Light and Optics
Union Gallery, 1st Floor, Stamp Student UnionContinuing through February 4, 2005
Gallery hours: Monday-Saturday, 10:00 AM – 8:00 PM
Guided tours by Prof. Berg: each Wednesday at12:30 PM
New from Lecture-Demonstration
Now on a two-DVD set:The classic four-hour video collection:
Demonstrations in Acousticsfor 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.
NewPhysics is Phun
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Go to the Physics is Phun web site and click on “mailing list” link
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Electricity and Magnetism
Physics is Phun
January 2005
Topics:Electrostatics
MagnetostaticsLaws of Electromagnetism
Electrostatics
Pity the poor neutron;he thought he was a proton
but he wasn’t positive.
Siphon
Quantum mechanicaltunneling
“Triboelectricity”
Chargingby
Induction
Polarization in the Atom
Electric forces on polar molecule
Van de Graaff
electrostatic generator:
simulates lightning
from cloud to ground
Lightning (1)
Lightning (2)
Lightning (3)
Lightning (4)
Lightning (5)
Lightning (6)
Lightning Rod
Simulator
Lightning striking theEmpire State Building
Magnetostatics
Lodestone
Magnet and Magnetic Field
Broken Magnet
Relationsbetween
electricity andmagnetism
Ampere’s Law:
Electric currentscreate
magnetic fields.
Lorentz Force:
Charges movingin a magnetic field
experience anelectromagnetic force.
Faraday’s Law of Induction:
A changing magnetic fieldcreates an electric field.
Lenz’s Law:
Induced electric currentsact so as to oppose the
motion that caused them.
Magnetsdroppedthrough
tube
Magnetic Levitation
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
Maglev Train “Tracks”
Train moving on Guideway at 500 mph
The Yamanashi Guideway for the MLX01
Electromagnetic Can Crusher
1. Slow motion view2. Diagram showing explanation
a. current from capacitor creates magnetic fieldb. increasing magnetic field induces electric fieldc. electric field moves electrons around cand. electrons feel inward and separation forcese. can cut in two and pushed apart
Slow motion of can crusher at Weslyan UniversityCompliments of Vacek Miglus
Cyclotron Dee discharge
Cyclotron ion source
We are on the web at
http://www.physics.umd.edu/lecdem/
Animated Gifs compliments of bellsnwhistles.com
The EndSee you in March!