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An Ideal Parallel-Plate Capacitor Consists of a Set of Two

Question 42

Multiple Choice

An ideal parallel-plate capacitor consists of a set of two parallel plates of area A separated by a very small distance d. When the capacitor plates carry charges +Q and -Q, the capacitor stores energy U0. If the separation between the plates is doubled, how much electrical energy is stored in the capacitor?


A) 4U0
B) 2U0
C) U0
D) U0/2
E) U0/4

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