42)
The capacitance C of the parallel plate capacitor is then
Q
C
=V
 = 
=εd0A
(2 43)
which, as expected, depends only on the geometry of the system For
typical values like A = 1 m2, d = 1 mm, we get
12
2
–1
–2
2
9
3
8 85
10
C N m
1m
8