The magnitude of the electric field between the plates of a parallel plate capacitor is 3.2 x 10^2 N/C. How would the field magnitude differ if the plate separation were to triple?

Question

anonymous · Answer

The correct answer for this was that since the electric field is only proportional to the charge, changing r has no effect.

anonymous · Answer

I just can't wrap my head around that, though. Help please?

anonymous · Answer

your answer is correct only if plates are of infinite dimensions...
if they are of finite dimensions then field will decrease with increase of plate separation...