An ideal air-filled parallel-plate capacitor has round plates and carries a fixed amount of equal but opposite charge on its plates. All the geometric parameters of the capacitor (plate diameter and plate separation) are now DOUBLED
If the original energy density between the plates was u0, what is the new energy density? A) 16u0
B) 4u0
C) u0
D) u0/4
E) u0/16
E
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Fill in the blank(s) with the appropriate word(s).