Van De Graaff Generator - Large - 400K

This Large Van De Graaff Generator is a high-output, compact electrostatics device designed for reliable performance in classroom demonstrations. With a 400kV voltage capacity and a 250mm dome, this model produces dramatic spark discharges and enables a wide range of static electricity experiments. All internal components are fully visible, giving students an excellent view of how electrostatic charge is generated and transported. Built with durable materials and a dismantlable design, this generator is suitable for frequent use and easy storage. It's an ideal tool for teaching foundational concepts in electric charge, energy transfer, and field interactions.

Educational benefits:

• Produces powerful visual demonstrations of high-voltage static electricity
• Allows students to explore key physics principles including charge distribution, induction, and potential
• Reinforces scientific reasoning by linking observable effects with theoretical models
• Exposes internal mechanisms to support learning about the function of each component
• Provides practical experience in handling lab equipment and understanding electrical safety

Classroom activity ideas:

• Investigate the spark length relative to humidity or dome size
• Combine with a neon lamp or pith ball apparatus for charge interaction experiments
• Set up a Faraday cage demonstration to show how charge behaves on conductors
• Allow students to safely test the effects of electrostatic discharge on various materials
• Use in comparative experiments with other generators to explore design differences

Specifications:

• Output voltage: 400kV
• Spark gap: Approx. 15cm
• Dome diameter: 250mm
• Discharge ball: 80mm diameter with insulated handle and earth terminal
• Charging belt: 55mm wide silicone rubber
• Motor: Speed-controlled DC electric motor

Dimensions:

• Total height: 700mm
• Base dimensions: 210mm x 160mm
• Discharge ball rod length: 490mm

Recommended for ages: Senior secondary students and up, with supervision