53)
The last two equations should be the same and hence
1 2
2 1
1
2
eq
r
r
r
r
ε
ε
ε
+
=
+
(3 54)
1 2
1
2
eq
r r
r
r
r
=
+
(3 55)
We can put these equations in a simpler way,
FIGURE 3 14 Two cells in
parallel