Vandergraph generators and hair

In summary, hair stands up when touching a vandergraph generator because of the negative charges on the hair strands. This negative charge causes the hairs to repel each other, as seen in a similar experiment with charged metal foil. The release of electrons into the air is not the cause, as it would be visible as sparks. This phenomenon is not necessary for homework or school, but it is caused by the excess negative charge on each hair strand.
  • #1
little inventor
2
0
1. WHy does hair stand up when touching a vandergraph generator ,i know that negative charges repel other negative charges







3. is it the fact the hairs are negatively charged so repel each other or is it the electrons releasing into the air
 
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  • #2
A similar experiment involves charging up two pieces of metal foil that are suspended adjacent to each other in a vacuum jar. When charged up with static electricity (both foils get an excess of electrons), the foil pieces repel each other. Why is that?
 
  • #3
so it is not going into the air and suggest highly of repusion because of negative because of electrons

i still don't know , if i don't need it for homework or school i was just curious
would still like to know
 
  • #4
If electrons were being released into the air you would probably be able to see them as sparks. Yes, you are right--each strand of hair has an excess of electrons and the excess negative charge on every hair causes the hairs to repel one another! :)
 

FAQ: Vandergraph generators and hair

What is a Vandergraph generator?

A Vandergraph generator is a device that produces high voltage static electricity using a belt and a metal comb. It was originally invented by American scientist Robert J. Van de Graaff.

How does a Vandergraph generator work?

A Vandergraph generator works by using a motor to turn a belt made of insulating material, such as rubber. The belt carries electric charges to the top of a metal dome, where they are stored. As the charges accumulate, they create a large electric potential, which can create sparks and discharge when objects come close to the dome.

Can a Vandergraph generator produce enough electricity to power a lightbulb?

No, a Vandergraph generator is not capable of producing enough electricity to power a lightbulb. It is designed to produce high voltage, low current electricity, which is not suitable for powering devices that require a significant amount of energy.

How is hair affected by a Vandergraph generator?

When a person's hair comes close to the dome of a Vandergraph generator, it can stand on end and even appear to float in the air. This is due to the static electricity produced by the generator, which causes the individual strands of hair to repel each other.

Is it safe to touch a Vandergraph generator while it is in operation?

Touching a Vandergraph generator while it is in operation can be dangerous as it produces high voltage electricity. It is important to follow safety precautions and only touch the generator with proper protective gear, such as rubber gloves, and only under the supervision of a trained professional.

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