Van De Graaff Help!

  1. 1. The problem statement, all variables and given/known data

    I have to make a van de graaff generator for my physics class.

    2. Relevant equations



    3. The attempt at a solution

    I put it together and it doesn't work at all. Please help. Is the reason it isn't working is that i don't have a glass tube or something else?

    1. The problem statement, all variables and given/known data

    We build one using pvc pipe, thin rubber band, small dc motor, and 2 plastic pulleys, brush wire, and a can. I made it based on this tutorial http://scitoys.com/scitoys/scitoys/electro/electro6.html The only difference is that mine uses a plastic pulley where the glass tube should go.

    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. lewando

    lewando 1,077
    Gold Member

    If that's the only difference, then its probably a good clue. Try using a glass (or maybe nylon) tube. The reason for it not working is rubber and plastic are on the same end of the "triboelectric series".
     
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