what is the priciple of van de graff generator?

  1. profile image45
    noushiraposted 7 years ago

    what is the priciple of van de graff generator?

  2. Ben Evans profile image71
    Ben Evansposted 7 years ago

    A Van De Graff generator uses a rubber belt to make a static charge by applying friction with a rubber belt.  There is an electrode at the top of the belt that allow charges to be held on the sphere.

  3. mcope7 profile image60
    mcope7posted 5 years ago

    The Van de Graaff generator is a "friction machine", but the only friction is that the machine has a roller at the top in the metal sphere and another roller in the base that is driven by a motor. A long belt loop, often white surgical rubber, is driven by the bottom rotating roller. The belt, like a conveyor belt, goes around these two rotating rollers. The belt only has to come in contact with the two rollers. The rollers are made of different materials, normally materials at opposite end of the Triboelectric Series scale, with the belt material between them on the scale. Metal combs collect charges over each roller. Due to the Triboelectric Effect, one comb collects positive charges and the other collects negative charges, thus building a voltage potential between the two. One set of charges go to the top metal sphere by a wire and the other set of charges goes to a discharge wand. The metal combs are positioned closely over the belt, but do not touch the belt. If you're interested in seeing the generators offered on Amazon, about 20 different ones, go to http://www.jusancy.com/article/van-de-g … ect-ideas/