(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Two very large, nonconducting plastic sheets, each 10.0 cm thick, carry uniform charge densities a,b,c,d on their surfaces. These surface charge densities have the values a= -6.00 nC, b= +5.00 nC, c= +2.00 nC, and d= +4.00 n\C.

Find the magnitude of the electric field at the point C, in the middle of the right-hand sheet.

looks like:

a----10 cm------b------12cm-----c------10cm------d

Point C is here----------------------------->

2. Relevant equations

Infinite sheet of charge field (charge)/(2*epsilon_0) N/C

3. The attempt at a solution

Well because the sheet is "Two very large, nonconducting plastic sheets," I treated them as thin infinite sheets with the distance of the thickness between them.

Adding the electric force vectors does not yield the correct answer, not sure where to go from there. I get the answer 169.491. I am not off by an order of magnitude even though it looks so. I have other problems of the same type that also give incorrect results.

I know the answer is 1.69×10^6 N/C but I am not sure how to get there.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Thick nonconducting sheets

**Physics Forums | Science Articles, Homework Help, Discussion**