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The Brainliest Answer!
2016-01-24T06:59:27+05:30
Most of us have seen the device, known as a VAN DE GRAAFF GENERATOR, that makes your hair stand one end. The device looks like a big aluminum ball mounted on a pedestal, and you can see its effect in the accompanying image.

Have you ever wondered that this device is, how it works, why it was invented or how you might build one yourself? Surely it wasn't invented to make people's hair stand on end... 
 
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plz mark
i have marked.. but this is not what i wanted... :3
so, which ans you want
u haven't explained working..of it!!! 
where are you from