Contents
Cal Poly Pomona
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Physics Demonstrations at Cal Poly Pomona

Demo Index:
    EM-A-BR
Pira Index:
    5A 20.10
Title:
    BIPOLAR RODS
Description:
    Demonstrates like and unlike charges.
Equipment:
    1. Special rods (all are not shown)
    large acrylic-PVC combination
    PVC rod
    acrylic rod
    thin acrylic-PVC combination
    thin PVC rod
    thin acrylic rod
    metal rod
    wooden rod
    2. Low friction pivot (this may be found w/ magnets 238--I--3)
    3. Paper towel
Procedure:
    1. Using the paper towel, charge both ends of a combination acrylic-PVC rod and place it on the swivel (the thin set works well on the overhead).
    2. Again with the paper towel charge the acrylic rod. Bring it near the acrylic end of the mounted rod-- it repels. Bring it near the PVC end & it attracts.
    3. Repeat with the PVC rod and any of the other rods you wish to try.