Test flag for demonstrating charge distribution on conductors Key benefits Makes an abstract concept visible: clearly shows that under electrostatic equilibrium the electric charge on a conductor distributes only on the outer surface and concentrates according to surface curvature. Simple, handson operation that is suitable for classroom demonstrations and student experiments, helping students grasp electrostatic principles more quickly. Designed for use with junior school physics electrical experiment equipment, offering an intuitive and repeatable demonstration tool. Features and specifications Function: Demonstrates outersurface charge distribution and the effect of surface curvature on local charge concentration when the conductor is charged and reaches equilibrium. Size: 34 x 21 cm (13.3 x 8.2 in), compact for tabletop lab setups and easy classroom handling. Operation: Easy to use with clear visual results; suitable for guided demonstrations and studentled experiments. Compatibility: Intended for junior school physics electrical experiment kits and basic electrostatics laboratory activities. Practical applications and use scenarios Classroom demonstration: Teacherled experiment to introduce electrostatic equilibrium and show how charge accumulates at sharper curvature points. Student laboratory exercise: Smallgroup activity where students test different conductor shapes and record how surface curvature affects charge distribution. Science fair or presentation: Portable visual aid to explain electrostatic behavior to peers and judges in a clear, handson way. Why choose this tool Provides a focused, educational demonstration of a key electrostatics principle without complicated setup. Sized for easy handling in classroom and lab environments. Supports lesson plans and lab activities for junior level physics courses while reinforcing conceptual understanding.