63. Using A = πr
2
with r = 5
× 10
−4
m with Eq. 27-5 yields
|
J
| =
i
A
= 2.5
6
A/m
.
Then, with
E
| = 5.3 V/m, Eq. 27-10 leads to
ρ =
5.3 V/m
2.5
= 2.1
−6
Ω
·m .