P22_025.PDF
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Chapter 22 - 22.25
22-4. The proton flux is given as 1500 protons per square meter
per second, where each proton provides a charge of
q
=+
e
. The current through the spherical area
4
πR
2
=4
π
(6
.
37
§
×
10
6
m)
2
=5
.
1
×
10
14
m
2
would be
i
=
5
.
1
×
10
14
m
2
1500
protons
s
·
m
2
1
.
6
×
10
−
19
C
/
proton
=0
.
122 A
.
25. The unit Ampere is discussed in
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