P25_008.PDF

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Chapter 25 - 25.8
8. (a) The potential as a function of r is
r
r
qr
4 πε 0 R 3 dr =
qr 2
8 πε 0 R 3
V ( r )= V (0)
E ( r ) dr =0
.
0
0
V ( R )= q/ 8 πε 0 R.
(c) Since ∆ V = V (0)
V ( R ) > 0 , the potential at the center of the sphere is higher.
(b) ∆ V = V (0)
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