28_Ch 16 College Physics ProblemCH16 Electrical Energy and Capacitance

# 28_Ch 16 College Physics ProblemCH16 Electrical Energy and Capacitance

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62 CHAPTER 16 (c) The total potential at point P is ( ) 4 4 1 2 1.8 3.6 10 V 1.8 10 V P V V V = + = + × = − × (d) The work required to move a charge q 3.0 C µ = to point P from infinity is ( ) ( )( ) 6 4 3.0 10 V 0 5.4 10 J P W q V q V V = = = × = − × 2 C 1.8 10 × 16.57 The stages for the reduction of this circuit are shown below. Thus, 6.25 F eq C µ = 16.58 (a) Due to spherical symmetry, the charge on each of the concentric spherical shells will be uniformly distributed over that shell. Inside a spherical surface having a uniform charge distribution, the electric field due to the charge on that surface is zero. Thus, in this region, the potential due to the charge on that surface is constant and equal
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