P27_024.PDF
(
54 KB
)
Pobierz
Chapter 27 - 27.24
24. (a)
i
=
V/R
=35
.
8V
/
935 Ω = 3
.
83
×
10
−
2
A.
(b)
J
=
i/A
=(3
.
83
×
10
−
2
A)
/
(3
.
50
×
10
−
4
m
2
) = 109 A
/
m
2
.
(c)
v
d
=
J/ne
= (109 A
/
m
2
)
/
[(5
.
33
×
10
22
/
m
3
)(1
.
60
×
10
−
19
C)] = 1
.
28
×
10
−
2
m
/
s.
(d)
E
=
V/L
=35
.
8V
/
0
.
158m = 227 V
/
m
.
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