A point charge near a stream of water

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SUMMARY

A point charge near a stream of water will induce a torque on the water molecules, which are permanent electric dipoles, but will not result in a net attraction or repulsion. The electric field generated by a point charge is non-uniform, contrasting with a uniform electric field that can exert forces on dipoles. Understanding the interaction between electric fields and dielectric materials, such as water, is essential, particularly in applications like fluidic pumps that utilize these principles.

PREREQUISITES
  • Understanding of electric dipoles and their behavior in electric fields
  • Knowledge of point charge electric fields
  • Familiarity with the Maxwell stress tensor
  • Basic principles of fluid dynamics and electrostatics
NEXT STEPS
  • Research the behavior of dipoles in non-uniform electric fields
  • Study the Maxwell stress tensor and its applications
  • Explore the principles behind fluidic pumps with no moving parts
  • Learn about dielectric materials and their interactions with electric fields
USEFUL FOR

Students of physics, electrical engineers, and researchers interested in electrostatics and fluid dynamics will benefit from this discussion.

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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 don't think the water would be affected by the charge
 
Physics news on Phys.org
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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