- #1

Bling Fizikst

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- Homework Statement
- Two parallel half planes are uniformly charged with surface charge densities ##+\sigma## and ##-\sigma## . Find magnitude and direction of electric field due to point ##P## located at a height ##h## above the edge of the positively charged half-plane . Distance ##d## between the planes is much smaller than ##h## .

- Relevant Equations
- refer to the image

I assumed the plate areas to be ##S## , then electric field at ##P## should be $$E_P=E_{+\sigma}-E_{-\sigma}=\frac{k\sigma S}{h^2}-\frac{k\sigma S}{(h+d)^2}\approx \frac{2k\sigma S d}{h^3}$$ but i think it's wrong here as ##P## lies at the edge , so it won't recieve electric fields in a way which would satisfy the aforesaid equations . Morever , the area is unknown and i doubt that it could be found .

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