P25_060 - 60. (a) The potential on the surface is 4.0 106 C...

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60. (a) The potential on the surface is V = q 4 πε 0 R = ( 4 . 0 × 10 6 C ) ³ 8 . 99 × 10 9 N · m 2 C 2 ´ 0 . 10 m =3 . 6 × 10 5 V . (b) The Feld just outside the sphere would be E = q 4 πε 0 R 2 = V R = 3 . 6 × 10 5 V 0 . 10 m
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