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?
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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