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Charged Rod and Pivot

A balloon next to a black rod
PIRA 5A20.10

Suspend a charged rod from a string so that it is balanced and free to rotate.  Electrostatic attraction and repulsion can be shown by bringing differently charged objects near.  The golf tube shown at right works well for this because of its large size and light weight.  It is light enough to show attraction to charged objects through induction when it is neutral.