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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.

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 Electric Fields And Potential
 Current and Resistance
 Electromotive Force And Current
 DC Circuits
 Magnetic Materials
 Complex Circuits
 Semiconductors And Tubes
 Transistor Amplifier
 Discharge Tubes
 Transmission Lines and Antennas

Discharge Tubes


To show the properties of Beta rays.


Connect the coil to the electrodes of the discharge tubes and switch the coil on. The voltage can be adjusted with the voltage pot and the polarity can be switched with the + and - switch. Different tubes show various phenomena:


  • Vaccum Pump
  • Alligator Clips
  • Solid State Induction Coil
  • Discharge Tubes