Electrostatic Potential Concept

Demonstrates that surface charge density on a conductor depends on local curvature. Students sample charge at different points on a tear-shaped conductor with a proof plane and compare electroscope deflections, …

Demonstrates how conductor geometry affects electric discharge. A pointed electrode produces continuous corona discharge, while a ball-topped electrode accumulates charge and produces dramatic sparks — directly illustrating lightning rod physics.

Demonstrates electric field concentration at sharp points and the lightning rod principle. A grounded paperclip on a wooden dowel silently bleeds charge from a Van de Graaff dome, stopping visible …

Corona discharge at the sharp tips of a wire whirl placed on a Van de Graaff generator produces ionic wind that drives mechanical rotation. Students see how concentrated electric fields …