

capacitance

formula

example


parallel plates

A >> d^{2}:



long parallel strips

For w/d < 1:
For w/d > 1:



isolated disk




two spheres of equal size




isolated sphere




concentric spheres

ε_{r}: relative permittivity of dielectric between spheres



coaxial cable

ε_{r}: relative permittivity of dielectric between conductors



infinetly long, thin wire




For h>>r:

h 
= 
100 
cm 
r 
= 
0.5 
mm 

C 
= 
6.7 
pF/m 


thin wire of finite length

Sfactor is computed automatically
(argument 2h/l or l/2h dpending on which is less than unity)



prallel wires over ground




prallel wires remote from ground




parallel wires of finite length above ground




vertical aligned wires parallel to ground

calculated like "parallel wires over ground" with h = (h_{1}+h_{2})/2



single layer solenoid

N: number of turns


