Asked by Physics lover

We can physically model the axonal membrane (axolemma) as a parallel plate capacitor with dielectric in it. If the capacitance per unit area in F/m^2 is known, what single additional parameter needs to be measured in order to determine the dielectric constant k of the membrane material?
a) No other measurement is necessary
b)
The area of the capacitor
c) The permittivity of free space E0
d) The thickness of the membrane
e) The resistance of the membrane

I know the answer is C but i don't know how to prove it mathematically or logically. Any help?
Answered by Chanz
kappa = Cd/Eo A
C/A is given
Eo can be looked up
so....
Answered by Physics lover
So the correct answer would be c) right?