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Why when you charge up the rubber rod with a wool cloth and bring it near...

Why when you charge up the rubber rod with a wool cloth and bring it near the flow of water without touching it, the flow of water try to move near to the rod?

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Answer #1

Due to oxygen atom being much more electro-negative than hydrogen atom, there is a permanent dipole on a water molecule - oxygen being negative and hydrogen being positive.

If you move a positive charged rod close to water:
The water molecules would orient themselves so their oxygen atoms would point towards the rod. Like charges attract, and water is bend towards the rod.


If you move a negative charged rod to water, the same thing happens, but this time the hydrogen would point towards the rod.

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