What is a Van de Graaff generator?

What is a Van de Graaff generator?

• A. A device for converting AC to DC
• B. A device for measuring current
• C. A device using static electricity to create interesting effects
• D. A type of transformer

Answer: (C)

This device demonstrates electrostatics by building up and storing a large amount of static charge on a conductor’s surface to create a very high voltage. It uses a moving insulating belt and nearby charged components to transfer charge to a hollow metal sphere. The charge spreads over the sphere’s surface, producing a strong electric field and potential difference relative to the surroundings. That high voltage is what lets you see dramatic effects like sparks or hair standing on end, all driven by static electricity rather than continuous current flow. It isn’t about converting AC to DC, nor is it a current-measuring instrument, and it isn’t a transformer. A Van de Graaff generator’s purpose is to accumulate and store static charge to create large voltages and observable electrostatic phenomena.

This device demonstrates electrostatics by building up and storing a large amount of static charge on a conductor’s surface to create a very high voltage. It uses a moving insulating belt and nearby charged components to transfer charge to a hollow metal sphere. The charge spreads over the sphere’s surface, producing a strong electric field and potential difference relative to the surroundings. That high voltage is what lets you see dramatic effects like sparks or hair standing on end, all driven by static electricity rather than continuous current flow.

It isn’t about converting AC to DC, nor is it a current-measuring instrument, and it isn’t a transformer. A Van de Graaff generator’s purpose is to accumulate and store static charge to create large voltages and observable electrostatic phenomena.