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Very Annoying Problem

  • Thread starter LuGoBi
  • Start date
  • #1
LuGoBi
This is killing me. I have an electrical charge in the air and below it I have a container filled with water. How do I calculate the electric field generated by the charge on the bottom of the cointainer? Bear in mind the electrostatic constant in water is different than from air.
 

Answers and Replies

  • #2
pam
455
1
Assuming the surface of the water is like an infinite plane, this is a standard image problem treated in most textbooks.
 
  • #3
LuGoBi
Assuming the surface of the water is like an infinite plane, this is a standard image problem treated in most textbooks.
Could you ellaborate, then?
 
  • #4
pam
455
1
I can't go through the whole method of images.
You may have to look at a book.
 
  • #5
malawi_glenn
Science Advisor
Homework Helper
4,786
22
smells like homework?
 
  • #6
367
1
Excuses me, pam (or others), but doesn't the method of images require that the boundary region be a (grounded) perfect conductor?

Treating the problem in a brute-force manner (Gauss' Law, Cartesian coordinates), this doesn't sound TOO bad. You just need to invoke some pretty clever trigonometry to account for the surface of the water.
 

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