Electric field intensity on thin electric sheets

AI Thread Summary
The discussion revolves around calculating the electric field intensity from thin electric sheets, specifically addressing the confusion around the equation E=1/2ε. Participants suggest considering the sheets as parallel plate capacitors, noting that each sheet contributes to the overall electric field. To determine the total electric field at a point, the contributions from each of the three charged sheets must be summed. The conversation emphasizes understanding the electric field produced by individual sheets of charge. Overall, clarity on the principles of superposition and the behavior of electric fields from charged sheets is essential for solving the problem.
Cocoleia
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Homework Statement


upload_2017-2-26_19-28-20.png


Homework Equations


The only equations I can think to use would be:
upload_2017-2-26_19-29-41.png

upload_2017-2-26_19-30-4.png

upload_2017-2-26_19-30-31.png

But I'm not sure if they are useful or how they will help.

The Attempt at a Solution


I have the solution, it just isn't detailed...
upload_2017-2-26_19-26-45.png

I don't understand where they get E=1/2ε. Should I be considering these as parallel plate capacitors?
 
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Cocoleia said:
I don't understand where they get E=1/2ε. Should I be considering these as parallel plate capacitors?
There are three sheets of charge. Each produces a field. To find the field at any point, add up the contributions from each sheet.

What's the field from a sheet of charge? See this: Electric Field: Sheet of Charge
 
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