A Parallel-Plate Capacitor Having Circular Plates of Diameter D and a Distance

question 28

Multiple Choice

A parallel-plate capacitor having circular plates of diameter D and a distance d apart stores energy U when it is connected across a fixed potential difference.If you want to triple the amount of energy stored in this capacitor by changing only the size of its plates,the diameter should be changed to:

• A)9D
• B)3D
• C)D

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