Projection Electroscope

DCS Code: 5A22.30 Last Updated: March 27, 2026
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Purpose

Demonstrates charge detection and polarity using a projection electroscope visible to the entire lecture hall. Students observe leaf deflection in response to charged objects, illustrating charging by contact, charging by induction, and charge conservation.

Projection electroscope with built-in lamp and lens (left) and projected image of the electroscope leaf on screen (right)
Figure 1: