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VAN DE GRAFF Generator. By Gary Zhong. What is an ATOM?. What is an atom made of?. 1. Protons: positive charge 2. Electrons: negative charge 3. Neutrons: no charge. Bohr Model. “Like charges repel, Opposite charges attract”. Insulators Conductors. Static Electricity.
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VAN DE GRAFF Generator By Gary Zhong
What is an atom made of? • 1. Protons: positive charge • 2. Electrons: negative charge • 3. Neutrons: no charge
Insulators • Conductors
Static Electricity • Visible attraction • Repulsion • Electrical sparks
TRIBOELECTRIC SERIES • Hand • Glass • Hair • Nylon • Wool • Fur • Silk • Paper • Cotton • Hard rubber • Polyester • Polyvinylchloride plastic
This charge imbalance is the origin of “Static Electricity”
Hair and comb demo • Combing your hair moves electrons from your hair to the comb • The comb will now have an electric static charge
What is a Van de Graff Generator? The basic fundamental principle behind this apparatus is separating opposite charges at both ends of the rubber belt
Main apparatus • Motor • Upper and lower roller • Belt • Upper and lower brush • Metal sphere
As the belt keeps running, more charges are deposited on both pulleys
Factors that affect spark production • Materials involved • Surface area connecting the materials • Humidity
Has anyone felt a shock on dry winter days? Static electricity can build up in our bodies and cause a spark to jump from our bodies to pieces of metal or those in our surroundings