Physics at the University of Virginia
Academics People Research Announcements Facilities Adminstration Home Updates

Return to Demo Lab Homepage

Al Tobias (wat4y) - Office: Gibson S123 & Physics 218, (434) 924-0538

Physics Demo Manual

Demonstrations are cataloged according to PIRA Bibliography


Due to Physics Building renovations, the lead time to set up demo requests has increased due to the need to transport equipment across campus. Please be kind and let me know well ahead of time what you need.

Choose a Topic or Enter a keyword to search:
I cannot find what I want!

You have selected the following Demos:
  • None Selected

Choose a subtopic:
(Clicking a green button will add that demo to your list)
 Electric Fields And Potential
 Current and Resistance
  video  - Resistance Model
  video  - Temperature Effects on the Resistance of Copper Wire
 Temperature Effects on Resistivity
  video  - Superconducting Wire
 Electromotive Force And Current
 DC Circuits
 Magnetic Materials
 Complex Circuits
 Semiconductors And Tubes
 Transmission Lines and Antennas

 video  - Resistance Model


Provides students with a physical analogue to electron collisions with atoms in a conducting solid.


centered image
centered image
  DEMO VIDEO DOWNLOAD w/ sound / 1920x1080 / 24.19Mb/s / 268MB size  

  DEMO VIDEO DOWNLOAD w/ sound / 854x480 / 5.69Mb/s / 63MB size  

One side of the ramp is free of "atoms" and represents accelerating electrons in a vacuum. The other side represents a solid with randomly placed atoms. The electrons (BB's) are slowed due to collisions with the atoms (staples) and leave the ramp with less energy than the electrons on the other side.