Definition

Noun: * Van de Graaff generator: An electrostatic machine that uses a moving belt to accumulate very high electrical potentials (voltages) on a hollow metal globe. It is primarily used as a demonstration device and particle accelerator in physics education and research.

Usage

The term "Van de Graaff generator" is a proper noun, named after its American inventor, Robert J. Van de Graaff. It is used to refer to the specific device itself. * The physics professor used a Van de Graaff generator to demonstrate electrostatic repulsion, making his student's hair stand on end. * Early particle physics experiments sometimes employed a Van de Graaff generator to accelerate charged particles.

Advanced Usage

• The device is often colloquially called a "static electricity generator" or simply a "Van de Graaff" in educational settings.
• It operates on the principle of electrostatic induction and charge transport via a belt, separating positive and negative charges to create a high voltage difference.

Variants and Related Words

• Electrostatic generator (n): A more general term for any machine that generates static electricity or high voltage through electrostatic principles. A Van de Graaff generator is a type of electrostatic generator.
• Pelletron (n): A later, improved type of electrostatic particle accelerator that uses a chain of alternating insulating and conducting links instead of a simple belt.

Synonyms

• Electrostatic accelerator
• Static machine (historical/less precise)

Related Phrases

• To be discharged from a Van de Graaff generator: Describes the rapid equalization of potential, often as a visible spark.
  • A large spark discharged from the Van de Graaff generator to the grounded sphere.

Noun

1. electrical device that produces a high voltage by building up a charge of static electricity