Van De Graaf: Why Do Bubbles Repel?

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In summary, the repulsion of bubbles in a Van De Graaf generator is caused by the build-up of static electricity on their surface. The shape of the bubbles does not significantly affect their repulsion, as long as they are spherical and contain air. Different types of gases can be used to create bubbles, but they must contain air to repel each other. There is no limit to the number of bubbles that can be generated, but the size of the generator and voltage produced may impact the amount. While mainly used for demonstration, the principle of static electricity and repulsion can have practical applications in technologies such as air pollution control.
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tg22542
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What happens when you blow bubbles at a van de graaf, and why does that happen? I know that the bubbles will repel once they get closer, but why?
 
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For an explanation and a great animation, see this:
http://www.magnet.fsu.edu/education/tutorials/java/bubbles/
 
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FAQ: Van De Graaf: Why Do Bubbles Repel?

1. Why do bubbles repel each other in a Van De Graaf generator?

The repulsion of bubbles in a Van De Graaf generator is due to the build-up of static electricity on the surface of the bubbles. As the generator creates a high voltage, the bubbles become negatively charged and repel each other due to their like charges.

2. How does the shape of the bubbles affect their repulsion?

The shape of the bubbles does not have a significant impact on their repulsion in a Van De Graaf generator. As long as the bubbles are spherical and contain air, the repulsion will occur due to the build-up of static electricity.

3. Can different types of gases be used to create bubbles in a Van De Graaf generator?

Yes, different types of gases can be used to create bubbles in a Van De Graaf generator. However, the bubbles will only repel each other if they contain air, as air contains charged particles that allow for the build-up of static electricity.

4. Is there a limit to how many bubbles can be generated in a Van De Graaf generator?

There is no specific limit to the number of bubbles that can be generated in a Van De Graaf generator. However, the size of the generator and the amount of voltage being produced may affect the number of bubbles that can be created.

5. Can the repulsion of bubbles in a Van De Graaf generator be used for any practical applications?

The repulsion of bubbles in a Van De Graaf generator is mainly used for demonstration purposes. However, the principle of static electricity and repulsion can be applied in various technologies, such as electrostatic precipitators used in air pollution control.

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