how does a spray comb gets positively charged in vandegraph generator
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Answer:
Inside the Van de Graaff generator is a rubber belt, which is stretched over two rollers. ... As the drive roller turns, by friction it charges the inside of the belt positive, which induces a negative charge on the bottom comb, which is grounded.
Explanation:
When the Van de Graaff generator starts charging, it transfers the charge to the person who is touching it. Since the person's hair follicles are getting charged to the same potential, they try to repel each other. This is why the hair actually stands up.
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