E-Field Lines and Equipotential Surfaces

AI Thread Summary
In the experiment mapping equipotential surfaces and electric field lines using electrodes in water, it was observed that electric field lines terminate on the surface of a conductor while passing through an insulator in a distorted manner. The conductor's behavior aligns with expectations, showing positive and negative charges on opposite sides and maintaining an equipotential surface. In contrast, a perfect insulator would not influence the electric field, allowing lines to enter and exit the surface without distortion. The discussion clarifies that the insulator behaves as if it is not present, with circular equipotential surfaces maintained. Understanding these principles is crucial for accurately depicting the behavior of electric fields around different materials.
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Hey all,

I'm a bit confused over an experiment in which we mapped Equipotential Surfaces to then use to draw Electric Field lines using electrodes placed into water to act as a dipole. Along with this, we also had to place a circular conductor and insulator (both uncharged) into the water as well.

From the data, it appears that the E-Field lines do not pass through the conductor (so the E-Field lines terminate on its surface with some coming out the other side perpendicularly, as expected) while it also seems E-Field and equpotential lines were allowed to pass through the insulator in a distorted fashion (I think this is also right).

Anywho, the analysis calls for depicting behavior of the equipotential surfaces and E-Field lines from an outside source on a "Perfect" circular and uncharged conductor and insulator. The conductor case is pretty straightforward (positive and negative charges on opposite sides of the outer surface, E-Field lines terminate on the negatives, come out from the positives, outer surface is an equipotential surface, etc). However, I'm not sure what the behavior for these lines/surfaces would be for a "Perfect" insulator. Would the lines/surfaces behave as if nothing was there (that is, E-Field lines going into and out of the surface, not necessarily perpendicularly, with circular equipotential surfaces)?

Any help would be greatly appreciated. =)
 
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A perfect insulator would not affect the E field at all. Sounds about right.
 
All right, thanks for the help man! :biggrin:
 
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