8_Chapter 16 HomeworkCH16 Electrical Energy and Capacitance

8_Chapter 16 HomeworkCH16 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 () ( ) 56 3.6 10 C 12 J C 4.3 10 J WqV =∆ = × + = × 16.7 (a) 5 3 600 J C 1.13 5.33 10 m V d × E (b) ( ) 19 5 14 1.60 10 C 1.13 1.80 10 N E −− == × × = × Fq (c) 14 3 17 cos 1.80 10 N 5.33 2.90 10 m cos0 4.38 10 J s WF θ =⋅  −× °  16.8 From conservation of energy, 2 2 1 0 or 2 ff qV mv
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