APFIVE Capacitor Fringing Effect
For a parallel-plate capacitor with circular plates of radius R, the ideal capacitance is given by C = εA/d. Which expression below best approximates the actual capacitance by including a correction for the fringing effect?
A
C ≈ εA/d(1 - d/R)
B
C ≈ εA/d(1 + d/πR)
C
C ≈ εA/d(1 + R/d)
D
C ≈ εA/d(1 - πR/d)
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