Contents
Cal Poly Pomona
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Physics Demonstrations at Cal Poly Pomona

Demo Index:
    EM-B-WP
Pira Index:
    5B 10.35
Title:
    WIMSHURST / PING - PONG DEMO
Description:
    Dramatic demonstration of the repulsion between like charges.
Equipment:
    1. Wimshurst machine (large)
    2. Ping -pong pie pan set
    3. 2 short A-A leads
    4. Plexiglas box



    Option--Ping-pong popper can be set on top of Van de Graaff instead of using the Wimshurst.
Procedure:
    1. Setup as shown. Move the Wimshurst discharge arms outward away from each other as shown.
    2. Place the ping-pong set on top of plexiglas box to isolate it from ground.
    3. Be sure that the A-A leads are isolated from each other and from ground. Attach one to top pan & other to bottom pan.
    4. Crank Wimshurst machine. As you gain speed & charge the ball will bounce rapidly up & down.
    Caution: to discharge the Wimshurst, carefully swing the discharge arms to the middle of the apparatus until they touch.