# Finding The Dielectric Constant?

1. Oct 18, 2005

### sanitykey

Hi, i'm currently an A2 student and was wondering is it possible to find dielectric values for different materials placed within parallel plate systems. I have an idea but i think doing this is more complicated than i expect. I found the equation:

k=Cd/epsilonzero*A

d = distance between the plates
A = surface area of one of the plates
epsilonzero = 8.854*10^-12 C^2/N*m^2
C = capacitance after the dielectric is placed between the parallel plate system

The only problem is i can't think of another way to calculate the new capacitance.

<EDIT> Changed the main text body of my thread because i noticed some of the things i wrote didn't make sense.

Last edited: Oct 18, 2005
2. Oct 18, 2005

### sanitykey

*cough*

ok i found a much simpler way to find the dielectric constant for parallel plate systems...

K = Eoriginal/Edielectric
K = Cdielectric/Coriginal

Where E=V/d

Would "d" be a constant if i didn't move the parallel plates further apart or closer together even after inserting the dielectric constant?

3. Oct 18, 2005

### Claude Bile

Yes it would. Only k would change upon insertion of the dielectric.

Claude.

4. Oct 19, 2005

### sanitykey

Thanks Claude that makes things clearer.