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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

PLEASE REQUEST DEMOS WELL IN ADVANCE

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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 Electrostatics
 Electric Fields And Potential
 Capacitance
 Current and Resistance
 Electromotive Force And Current
 DC Circuits
 Magnetic Materials
 Magnetism
 Magnet collection
  video  - Magnetic Fields w/ Iron Filings
  video  - Magnetic Fields w/ Matrix of Iron Rods
  video  - Magnetic Fields Associated with Current Carrying Wires 1
  video  - Magnetic Fields Associated with Current Carrying Wires 2
  video  - Solenoid w/ Iron core
  video  - Magnetic Deflection of an Electron Beam
  video  - e/m Tube Lorentz Force Demonstrator
 Magnetohydrodynamic Motor
  video  - Forces Between Current Carrying Wires
  video  - Vibrating Lamp Filament
  video  - Force on a Current Carrying Wire in a Magnetic Field
 Hall Effect
  video  - Galvanometer Movement
 Inductance
 Induction
 Complex Circuits
 Semiconductors And Tubes
 Transmission Lines and Antennas

 video  - Force on a Current Carrying Wire in a Magnetic Field

Purpose:

An illustration of the force exerted by a magnetic field on the moving charges in a current carrying wire.

Procedure:

centered image
  DEMO VIDEO DOWNLOAD / no audio / 1920x1080 / 24.19Mb/s / 487MB size  

  DEMO VIDEO DOWNLOAD / no audio / 854x480 / 5.69Mb/s / 120MB size  


Hang a single wire between the stands such that it passes between the poles of the horseshoe magnet at its lowest point. Connect the switch to the battery and to the base of the pole to which the hanging wire is attached. Depending on the orientation of the magnet and the direction of the current flow in the wire, when the switch is thrown the wire will either "jump away" from the magnet or be "pulled" into it.

Equipment:

  • 12 V Car Battery
  • Force Between Wires Apparatus
  • Large Horseshoe Magnet