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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Mechanics
Fluid Mechanics
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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 - Magnetic Deflection of an Electron Beam

Purpose:

To demonstrate that an electron in a magnetic field experiences a force.

Procedure:

DEMO VIDEO DOWNLOAD

SETUP:

Turn on the power supply. Voltage should be set to about to 2.5 kV. Use a bar magnet to deflect the beam. Take the opportunity to illustrate the right hand rule using both poles of the magnet. Remember, electrons are negatively charged!

Hints:

In PHS 203, turn the chalkboard lights ON and turn OFF the first two rows of fluorescent lights, then the electron beam spot is more visible via Camera/West.

Equipment:

Bar magnet
Heathkit oscilloscope