Allegedly uniform field in a capacitor

 

“Because the electric field is uniformly spread over the plates ….”

“Electricity and Magnetism” by B I Bleaney, Lecturer in Physics, St. Hugh’s College, Oxford, and B Bleaney, Fellow of St. John’s College, University Demonstrator and Lecturer in Physics, Oxford, pub. Oxford Clarendon Press,

1957 p236; 1965 p256

10.1 X ELECTROMAGNETIC WAVES

Maxwell’s equations of the electromagnetic field

….  ….

1957 p238; 1965 p258

….  ….

If for simplicity we take a parallel plate condenser with plates area A, surrounded by a guard ring, the field between the plates is uniform, and the displacement D has the value D=q/A, where q is the total charge on the positive plate.

….  ….

 

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“Fundamentals of Physics” by R Resnick and J Walker,  pub. Wiley 2001, p761

 

“32.10 Displacement Current

“…. Assuming that the electric field E between the two [capacitor] plates is uniform …. …. Because the electric field is uniformly spread over the plates, the same is true of this fictitious displacement current ….”

 

Discussion of http://www.ivorcatt.com/4_6.htm from http://www.ivorcatt.com/em.htm

This looks further into the evidence for the fact that text book writers including Bleaney have always thought the field between the capacitor plates is uniform.