Contents
Cal Poly Pomona
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Physics Demonstrations at Cal Poly Pomona

Demo Index:
    EM-A-DE
Pira Index:
    5A 10.10
Title:
    DEMO ELECTROSCOPE
Description:
    Shows the presence of static charge.
Equipment:
    1. Demo electroscope
    2. Large PVC rod
    3. Large plastic rod
    4. Paper towel
Procedure:
    1. Rub one of the rod using the paper towel to give it a charge. PVC takes on a negative charge and the plastic tube becomes positively charged.
    2. The electroscope works best if charged by induction. Hold the charged rod close (but not touching) to the electroscope. Touch the sphere with your hand, remove your hand and then remove the rod. The scope is charged oppositely to the rod’s charge.