8_Ch 16 College Physics ProblemCH16 Electrical Energy and Capacitance

# 8_Ch 16 College Physics ProblemCH16 Electrical Energy and Capacitance

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42 CHAPTER 16 16.5 6 2 25 000 J C 1.7 10 N C 1.5 10 m V E d = = = × × 16.6 Since potential difference is work per unit charge W V q = , the work done is ( ) ( ) ( ) 5 6 3.6 10 C 12 J C 4.3 10 J W q V = = × + = × 16.7 (a) 5 3 600 J C 1.13 10 N C 5.33 10 m V d = = = × × E (b) ( ) ( ) 19 5 14 1.60 10 C 1.13 10 N C 1.80 10 N E = = × × = × F q (c) ( ) ( ) 14 3 17 cos 1.80 10 N 5.33 2.90 10 m cos0 4.38 10 J s W F θ = = × × ° = × 16.8 From conservation of energy, (
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