P25_013.PDF

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Chapter 25 - 25.13
13. (a) The potential difference is
V A
q
4 πε 0 r B
= 1 . 0 × 10 6 C 8 . 99 × 10 9 N
q
4 πε 0 r A
1
2 . 0m
= 4500 V .
m 2
C 2
1
1 . 0m
(b) Since V ( r ) depends only on the magnitude of r , the result is unchanged.
V B =
·
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