A parallel plate capacitor with plate separation do is charged by connecting it to a battery. The energy stored by the capacitor is Uo. The battery is then disconnected and the plate separation is changed to di = 0.7do. If U1 is the energy stored by the capacitor when the plate separation is di, what is the ratio U1/Uo? O (a) 0.7 O (b) 0.837 O (c) 0.49 O (d) 2.04 O (e) 1.43 O (f) 1.2

College Physics
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Chapter16: Electrical Energy And Capacitance
Section: Chapter Questions
Problem 56P: A parallel-plate capacitor has plates of area A = 7.00 102 m2 separated by distance d = 2.00 104...
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A parallel plate capacitor with plate separation do is charged by connecting it to a battery. The energy stored
by the capacitor is Ug. The battery is then disconnected and the plate separation is changed to d1 = 0.7do. If
U1 is the energy stored by the capacitor when the plate separation is di, what is the ratio U1/Uo?
O (a) 0.7
O (b) 0.837
O (c) 0.49
O (d) 2.04
O (e) 1.43
O (f) 1.2
Transcribed Image Text:A parallel plate capacitor with plate separation do is charged by connecting it to a battery. The energy stored by the capacitor is Ug. The battery is then disconnected and the plate separation is changed to d1 = 0.7do. If U1 is the energy stored by the capacitor when the plate separation is di, what is the ratio U1/Uo? O (a) 0.7 O (b) 0.837 O (c) 0.49 O (d) 2.04 O (e) 1.43 O (f) 1.2
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