An Ideal Air-Filled Parallel-Plate Capacitor Has Round Plates and Carries

question 45

Multiple Choice

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 capacitance was C₀,what is the new capacitance?

• A) 4C₀
• B) 2C₀
• C) C₀
• D) C₀/2
• E) C₀/4

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