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

near top of page

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!