The magnitude of electric field `vecE` in the annular region of a charged cylindrical capacitor.

The magnitude of electric field vecE in the annualr region of a charged cylidrical capacitor.

How does the electric field (E) between the plates of a charged cylindrical capacitor vary with the distance r from the axis of the cylinder ?

How does the electric field (E) between the plates of a charged cylindrical capacitor vary with the distance r from the axis of the cylinder ?

How does the electric field (E) between the plates of a charge cylindrical capacitor vary with distance (r) from the axis of the cylinder?

Show that the force on each plate of a parallel plate capacitor has a magnitude equal to (1//2) QE, where Q is the charge on the capacitor, and E is the magnitude of electric field between the plates. Explain the origin of the factor 1//2 .