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A point charge near a stream of water

  • Thread starter dogeatdog
  • Start date
  • #1
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Homework Statement


if a point charge is brought near a narrow stream of water will the water be attracted to the charge, repelled from it, or neither? why? water molecules are permanent electric dipoles.


Homework Equations


not sure


The Attempt at a Solution


i dont think the water would be affected by the charge
 

Answers and Replies

  • #2
1,679
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This comes up a lot.

A uniform electric field will torque but not pull or push a dipole. But a point charge doesn't have a uniform field, right?

Q: what are the forces on a dielectric body in an electric field? The answer has to do with the Maxwell stress tensor. Hint: there are US patents for fluidic pumps with no moving parts that are based on these principles.
 

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