Physics Demo Manual

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.

Electrostatics   video  - Kinds of Charge and Charging   video  - Attraction and Repulsion Between Charged Objects   video  - Charging by Induction   video  - Lord Kelvin's Water-Drop Electrostatic Generator   video  - Wimshurst Machine   video  - Fun Fly Stick   video  - Xerox   video  - Fluorescent Bulb in Faraday Cage  Electric Fields And Potential  Capacitance  Current and Resistance  Electromotive Force And Current  DC Circuits  Magnetic Materials  Magnetism  Inductance  Induction  Complex Circuits  Semiconductors And Tubes  Transmission Lines and Antennas

video  - Charging by Induction Purpose: To demonstrate charging of objects by induction. Procedure:   DEMO VIDEO DOWNLOAD   Use the "Faraday Ice Pail "cage as a reliable electroscope that also measures the charge sign. Rub Teflon stick on silk (Teflon = negative charge) or glass/Lucite on Teflon wrap (glass/Lucite = positive charge) and transfer it to the "Pith Ball on a Stick" by touching. Measure the charge with electroscope. Next, reset the electroscope (ground Faraday cage w/ lever) and charge the "Pith Ball on a Stick" by induction. Do so by short circuiting the pith ball to the grounded outer metal cage. Bring the charged object close and "disconnect" the ground by removing the "Pith Ball on a Stick" from the outer cage. Demonstrate on the electroscope that the charge on the ball is now opposite to what it was while charged by touching.