E-Field Lines and Equipotential Surfaces

In summary, the conversation revolved around conducting an experiment with Equipotential Surfaces and Electric Field lines using electrodes and a circular conductor and insulator. The data showed that the E-Field lines did not pass through the conductor, while they were allowed to pass through the insulator in a distorted fashion. The analysis called for depicting the behavior of the equipotential surfaces and E-Field lines on a "perfect" conductor and insulator, with the conclusion that a perfect insulator would not affect the E field at all.
  • #1
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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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  • #2
A perfect insulator would not affect the E field at all. Sounds about right.
 
  • #3
All right, thanks for the help man! :biggrin:
 

What are E-field lines and what do they represent?

E-field lines are visual representations of the electric field in a given region. They show the direction and strength of the electric field at each point.

How are E-field lines and equipotential surfaces related?

E-field lines and equipotential surfaces are perpendicular to each other and intersect at right angles. E-field lines point in the direction of the electric field, while equipotential surfaces represent points with equal electric potential.

How do E-field lines and equipotential surfaces help us understand the electric field?

E-field lines and equipotential surfaces provide a visual representation of the electric field, making it easier to understand its direction and strength. They also help us understand how the electric field changes in different regions and how it affects charged particles.

Can E-field lines cross each other?

No, E-field lines cannot cross each other. This is because the electric field has a unique direction and strength at each point, and if two E-field lines were to cross, it would mean that there are two different electric fields at that point, which is not possible.

Why do E-field lines spread outward from positive charges and inward towards negative charges?

E-field lines spread outward from positive charges because positive charges repel each other, and the electric field lines represent this repulsion. Conversely, E-field lines point inward towards negative charges because negative charges attract positive charges, and the electric field lines represent this attraction.

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