Is the C=εA/d Formula for a Parallel Plate Capacitor an Approximation?

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The formula C=εA/d for a parallel plate capacitor is generally considered accurate, despite being an approximation. Concerns about the edge effects, known as fringe effects, do exist, but their impact on the overall capacitance is typically negligible. The formula assumes ideal conditions, such as large plate sizes and uniform electric fields. While more complex models can account for these edge effects, they often yield minimal differences in practical applications. Overall, the C=εA/d formula remains a reliable representation for most scenarios involving parallel plate capacitors.
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Just wondering if the formula C=εA/d is a realistic formula for a parallel plate capacitor, surely its making an approximation about the plates being HUGE or that at the edges the electric field doesn't go in nice straight lines from one plate to the other?

If it is an approximation does anyone know the more accurate formula
 
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Yes, it is an accurate formula. Why do you doubt it?
 
I just thought that effects at the edge of the plate would affect it slightly
 
It does affect. But i guess the error of not taking into account is negligible!
Its called fringe effect in capacitor.
 

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