Electric field inside a charged dielectric

AI Thread Summary
The discussion centers on determining the electric field inside a charged dielectric plate with surface charge density. The initial hypothesis suggests that the electric field within the dielectric is zero due to equal and opposite contributions from both surfaces. This conclusion is affirmed for infinite plates, where the opposing fields cancel each other out. However, the simplicity of the answer raises questions about potential oversights in the analysis. Ultimately, the consensus is that the reasoning holds true for infinite plates, confirming the absence of an electric field inside the dielectric.
ijustlost
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I've been thinking about this problem a while and can't seem to get anywhere.

A charged dielectric plate of thickness t has permittivity e. The 2 surfaces each have a surface charge density +s. Obtain an expression for the electric field inside the dielectric.

I think the answer is be that there is no field within the dielectric, as the field contributions from the two sides of the plate are equal but in opposite directions. But this seems to simple. Am I correct or have I completely missed something out?
 
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I think that's it.
 
No, if the plates are infinite in size you are totally correct.
 
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