Rolling Can

DCS Code: 5A40.20 Last Updated: March 27, 2026
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Purpose

Demonstrates electrostatic induction in conductors. A charged rod induces charge separation in a neutral aluminum can, causing the can to roll toward the rod regardless of the rod's polarity. Addresses the misconception that neutral objects are unaffected by charged objects.

Charging rods (white Teflon rod and clear glass rod) with fur and silk charging materials, alongside a Pepsi aluminum can
Figure 1: Equipment for the rolling can demonstration: Teflon and glass charging rods with fur and silk, and an aluminum beverage can.
Equipment